Introduction
Most of my recipes incorporate stabilizers to improve texture, reduce ice crystal formation, and maintain overall quality. This guide explains the stabilizers and emulsifiers I use and offers substitution tips and blend ratios for your convenience.
If you don't have the specific stabilizers mentioned, there are plenty of alternatives:
Omitting Stabilizers: You can choose to leave them out entirely if the ice cream will be consumed quickly and not exposed to repeated freeze–thaw cycles, though texture may be affected.
Using Substitutes: Replace unavailable stabilizers with readily sourced alternatives. Note that adjustments in weight or hydration conditions may be necessary. Always begin at the lower recommended dosage and adjust based on performance.
Usage Guidelines
Dosage Reference: All recommendations below are based on a 1000 g mix.
Precision: Use a high-precision scale (e.g., a jewelry or pocket scale with 0.01 g accuracy) when measuring small amounts. These are inexpensive and readily available.
Mixing Technique: Always blend stabilizers with sugar and/or other dry ingredients before adding them to the liquid. Vigorous whisking or blending (using a stick or immersion blender) ensures even dispersion and prevents clumping.
Aging: After preparing and heating the mix, it should be aged (rested) in the refrigerator for 4–24 hours before churning. Aging allows stabilizers to fully hydrate, proteins to adsorb onto fat globules, and fat to crystallize — all of which improve body, texture, and air incorporation during churning.
General Tip: For gum stabilizers, start with about 0.25% of the water weight (roughly 0.12% of total mix weight) as a good starting point.
Common Stabilizers
Gelatin (E441)
Source: Derived from animal collagen.
Usage: Use one sheet or approximately 2 g per 1000 g mix.
Hydration:
- Temperature: Hydrate at approximately 50°C (122°F).
- Time: Allow gelatin to bloom for 5–10 minutes in cold water, then heat gently until fully dissolved.
Properties: Provides very good ice crystal suppression and excellent body and mouthfeel. Requires a longer aging period for optimal performance once incorporated into the mix. Easy to source in most stores. Not suitable for vegetarian or vegan formulations.
Locust Bean Gum / LBG (E410)
Source: Carob bean from the Ceratonia siliqua tree, grown mostly in the Mediterranean area.
Usage: Approximately 1 g per 1000 g mix.
Hydration:
- Temperature: Requires heating to about 85°C (185°F) for full hydration.
- Time: Maintain the temperature for 2–5 minutes to ensure complete dispersion.
Properties: The gold standard for reducing ice crystal size. Adds medium viscosity and provides excellent heat–thaw resistance. Does not produce any taste or flavor-masking properties. If you only want to use one stabilizer, LBG is a strong candidate.
Tara Gum (E417)
Source: Seeds of the Caesalpinia spinosa pod.
Usage: Use 1–3 g per 1000 g mix.
Hydration:
- Temperature: Partially soluble in cold water, but full hydration is achieved at around 80°C (176°F).
- Time: A brief heating (2–5 minutes) is typically sufficient.
Properties: Functions similarly to a blend of LBG and guar gum and can often substitute for those blends on a one-to-one basis. Unlike LBG, tara gum does not cause wheying off, so it can be used without adding carrageenan. Does not mask flavors.
Guar Gum (E412)
Source: Guar bean (Cyamopsis tetragonoloba), grown in India and Pakistan for centuries.
Usage: Use 0.5–1 g when used alone.
Hydration:
- Temperature: Hydrates well in cold conditions.
- Time: Disperses quickly, typically within a few minutes when mixed with other dry ingredients before liquid incorporation.
Properties: Adds body and viscosity, provides heat-shock resistance. Less effective than LBG for ice crystal suppression. Overuse may result in a chewy texture.
Lambda Carrageenan (E407)
Source: Derived from red algae (e.g., Chondrus crispus, Eucheuma cottonii, E. spinosum).
Usage: Commonly used as part of a blend (e.g., 0.2–0.3 g per 1000 g mix).
Hydration:
- Temperature: Hydrates in cold conditions.
- Time: 1–2 minutes for full dispersion.
Properties: Controls wheying off (water separation during melting) and improves melt smoothness. Mainly used in combination with other stabilizers rather than alone.
Important: There are three types of carrageenan — kappa, iota, and lambda. Only lambda carrageenan is suitable for ice cream. Kappa carrageenan forms rigid gels and iota carrageenan forms elastic gels — both will cause grittiness or unwanted gelation in ice cream. When purchasing carrageenan, make sure you are getting the lambda type. Products labeled simply as "carrageenan" without specifying the type should be avoided.
Xanthan Gum (E415)
Source: Fermented from Xanthomonas campestris.
Usage: Use 0.2–0.5 g. Be careful with dosage — too much creates a slimy texture.
Hydration:
- Temperature: Hydrates in cold conditions; pre-dispersion with dry ingredients is recommended.
- Time: Usually a few minutes once incorporated.
Properties: Provides viscosity and pH resistance. Easy to source. Less effective at ice crystal suppression than LBG. Works well blended with guar gum and/or locust bean gum.
Sodium Carboxymethyl Cellulose / CMC (E466)
Source: A chemically modified natural gum (linear, long-chain, water-soluble polysaccharide).
Usage: Use 0.5–1 g per 1000 g mix.
Hydration:
- Temperature: Hydrates in cold conditions.
- Time: Typically disperses within a few minutes when well mixed.
Properties: Adds body and slight chewiness. Offers strong ice crystal suppression. Forms weak gels by itself but gels well in combination with carrageenan, LBG, or guar gum. Good choice for cold-process recipes.
Additional Stabilizers
Corn Starch
Hydration: Requires heating to around 80–90°C to gelatinize (1–3 minutes once temperature is reached).
Usage: Typically 0.5–1% of the mix weight.
Considerations: Activation via heating increases viscosity. Overuse can impart a starchy flavor or lead to retrogradation (syneresis).
Tapioca Starch
Hydration: Heats similarly to corn starch, around 80–90°C (1–3 minutes).
Usage: Typically 0.5–1% of the mix weight.
Considerations: Enhances creaminess with a neutral flavor.
Potato Starch
Hydration: Typically activated at 80–90°C (1–3 minutes).
Usage: Around 0.5–1% of the mix weight.
Considerations: Ensure even dispersion to prevent clumping.
Pectin
Hydration: Low methoxyl pectin usually requires heating (around 80°C) and the addition of calcium ions to form a gel (a few minutes at the appropriate conditions).
Considerations: Less common in ice cream but may be used in specialty fruit-based frozen desserts such as sorbets.
Inulin
Source: A soluble dietary fiber extracted from chicory root.
Usage: Typically 3–8% of the mix weight, depending on the formulation goal.
Hydration: Dissolves in both hot and cold liquids.
Considerations: Not a traditional stabilizer, but increasingly popular in reduced-fat and sugar-free ice cream. Inulin provides body and creaminess that can partially replace the textural role of fat. At higher concentrations (above 8–10%), it can form a gel-like network. It also adds a slight sweetness and is classified as a prebiotic fiber, which appeals to health-conscious consumers.
Recommended Blends
LBG + Guar Blend (2:1 Ratio)
Usage: Combine 0.8 g LBG with 0.4 g guar gum per 1000 g mix.
Hydration: Heat to 85°C (185°F) for 2–5 minutes. Guar hydrates in cold conditions — pre-mix with dry ingredients to prevent clumping.
Notes: This blend balances the properties of both gums to enhance ice crystal suppression and body.
LBG + Guar + Lambda Carrageenan (4:2:1 Ratio)
Usage: Use 0.8 g LBG, 0.4 g guar gum, and 0.2 g lambda carrageenan.
Hydration: LBG requires 85°C for 2–5 minutes. Guar and lambda carrageenan hydrate in cold conditions.
Notes: A very good general-purpose blend. LBG for ice crystals, guar for body, and lambda carrageenan for a smooth melt and to reduce wheying off.
Gelatin + Xanthan Gum
Usage: Use 1 g gelatin with 0.3 g xanthan gum.
Hydration: Bloom gelatin 5–10 minutes in cold water, then heat to ~50°C. Xanthan hydrates cold — pre-disperse in sugar or dry ingredients.
Notes: Be cautious with xanthan gum — too much may produce a slimy texture.
Tara + Xanthan Blend
Usage: Use 1.0 g tara gum with 0.3 g xanthan gum per 1000 g mix.
Hydration: Tara gum fully hydrates at about 80°C (176°F) for 2–5 minutes. Xanthan hydrates cold.
Notes: This blend leverages the structural benefits of tara gum with the viscosity-enhancing properties of xanthan gum.
CMC + Guar + Lambda Carrageenan (Cold Process)
Usage: Use 0.8 g CMC, 0.65 g guar gum, and 0.3 g lambda carrageenan.
Hydration: All three hydrate in cold conditions — ensure they are well dispersed before adding to the mix.
Notes: This blend is particularly suited for formulations that do not involve a heating phase. If you blend your own cold-process stabilizer, these are your go-to gums.
Neutro: Combining Stabilizers with Emulsifiers
In many recipes, "stabilizers" may actually refer to a blend of both stabilizers and emulsifiers — a combination known as Neutro. When a recipe calls for 5 g of "stabilizer," it often implies a blend with an emulsifier-to-stabilizer ratio of about 60:40. This approach is popular for egg-free ice creams and gelato.
For any of the stabilizer blends above, you can add an emulsifier to create a Neutro. Common emulsifiers include lecithin or mono- and diglycerides of fatty acids (E471).
Example Cold-Process Neutro Blend
Stabilizers:
- 0.80 g Carboxymethyl Cellulose (CMC)
- 0.65 g Guar Gum
- 0.30 g Lambda Carrageenan
Emulsifier:
- 3.25 g Mono- and Diglycerides of Fatty Acids (E471)
Notes: Alternative emulsifiers include lecithin or other mono- and diglycerides. Adjust the ratios to achieve the desired melt, creaminess, and shelf stability.
Emulsifiers in Ice Cream
What Is an Emulsion?
An emulsion is a mixture of two liquids that normally do not mix. In ice cream, we deal with a fat-in-water emulsion. Milk and cream are naturally occurring emulsions — milk fat is suspended in water, and proteins such as casein act as emulsifiers. Homogenized milk or cream forms a stable emulsion, meaning it will not separate during storage.
Why Emulsifiers Are Needed
During the ice cream-making process, the machine's dasher whips the mix to create a network of fat and proteins that traps air bubbles. As fat droplets collide, they join together to form a network capable of holding air. However, ice cream typically has a fat content much lower than what's required for effective whipping — unlike cream, which needs at least 30% fat to be whipped successfully.
Milk and cream, in their natural state, are too stable as emulsions, which actually hinders the incorporation of air. To overcome this, an emulsifier is added. The emulsifier partially displaces the proteins in the milk, destabilizing the emulsion in a controlled way. This controlled destabilization allows the fat droplets to partially coalesce during churning, forming the foam network necessary for trapping air.
Benefits of Adding an Emulsifier
By weakening the milk/cream emulsion, the emulsifier:
- Enables better incorporation of air during the churning process (improved overrun)
- Produces a smoother and drier texture
- Helps the ice cream melt more slowly
- Allows the ice cream to maintain its shape better
- Improves the stability of air cells in the frozen product
Common Emulsifiers
Egg Yolk
Role: Naturally contains phospholipids (lecithin) and proteins that moderate partial coalescence.
Usage: Typically 4–6 egg yolks per liter of mix (approximately 60–90 g), which is about 5–8% of total mix weight. This is the traditional approach for French-style custard bases.
Notes: Adds flavor, color, and richness. Not suitable for egg-free or vegan formulations. Requires heating to at least 72°C (162°F) to pasteurize, which also activates the emulsifying properties.
Lecithin (Soy or Sunflower)
Role: Similar to egg yolk in moderating the fat network.
Usage: Typically 0.1–0.5% of the mix weight.
Notes: Available in liquid or powder form. Suitable for clean-label and non-dairy applications. Sunflower lecithin is preferred for allergen-free formulations.
Mono- and Diglycerides / MDG (E471)
Role: Weakens the emulsion slightly to promote controlled partial coalescence.
Usage: Typically 0.1–0.5% of the mix weight.
Notes: Derived from natural fats and oils. The most commonly used commercial emulsifier in ice cream. Works well in combination with other emulsifiers. Often supplied as a powder or flake.
Glycerol Monostearate / GMS
Role: A specific type of monoglyceride that is very effective at promoting fat destabilization and air incorporation.
Usage: Typically 0.1–0.3% of the mix weight.
Notes: Very commonly used in commercial ice cream production, often alongside or instead of generic MDG. Melts at around 60°C and is incorporated during the heating stage.
Polyglycerol Esters of Fatty Acids (E473)
Role: Functions similarly to E471 to control the fat network.
Usage: Typically 0.1–0.5% of the mix weight.
Notes: Effective in managing texture and stability.
Polysorbate 80
Role: Reduces interfacial tension to aid in air incorporation and controlled fat coalescence.
Usage: Typically used at very low levels (0.02–0.04% of the mix weight). The FDA regulatory maximum for frozen desserts is 0.1%.
Notes: Synthetic but approved for food use. Very effective at promoting partial coalescence even at low concentrations. Often used in combination with MDG in commercial formulations.
Blending Emulsifiers with Stabilizers
Synergistic Function: Emulsifiers and stabilizers work together to optimize texture and stability. Stabilizers control ice crystal size and increase viscosity, while emulsifiers manage the fat network by promoting partial coalescence. Together, they also improve overrun — the amount of air incorporated during churning — and the stability of air cells in the finished product.
Neutro Blends: Often, especially in egg-free ice creams and gelato, a combination (or "Neutro" blend) is used. For example, an emulsifier-to-stabilizer ratio of approximately 60:40 may be used, though this should be adjusted based on desired overrun, melt behavior, and creaminess.
Clean-Label Considerations
Modern consumers often seek "clean labels" — products made with natural, minimally processed ingredients. Many stabilizers used in ice cream fit this trend.
Understanding E-Numbers
An E-number is a standardized code used in the European Union to classify food additives. Many natural and fermentation-derived stabilizers carry E-numbers (e.g., E412 for guar, E410 for LBG, E417 for tara, E415 for xanthan). The presence of an E-number does not mean the ingredient is synthetic or harmful — it simply indicates that it has been evaluated and approved for food use.
Clean-Label Friendliness Ranking
Based on current consumer perceptions, here is an approximate ranking of stabilizers and related ingredients from most to least label-friendly:
- Starches (corn, tapioca, potato) — Very familiar names, widely perceived as natural
- Egg Yolk — Traditional, easily understood, natural emulsifying properties
- Citrus Fiber — Name clearly reflects its source, attractive for clean-label products
- Gelatin — Well-known but animal-derived, may not suit vegetarian/vegan formulations
- Locust Bean Gum — Naturally derived from carob beans, though the name may be unfamiliar. Adding "carob bean gum" on the label can help
- Guar Gum — Natural but the name may not immediately convey its plant origin
- Tara Gum — Less common, may require additional context for consumers
- Xanthan Gum — Produced via fermentation (a natural process), but the name can be off-putting
- CMC — Chemical-sounding name and E-number (E466) may lead some consumers to perceive it as less natural
Technical Terms Explained
Wheying Off
Wheying off is the separation of water from the ice cream mix during melting, which can result in a watery or uneven texture. Ingredients like lambda carrageenan are used to reduce this effect for a smoother melt.
Heat–Thaw Cycle
This term describes repeated temperature fluctuations — such as when ice cream is taken out of the freezer and then refrozen — which can lead to the formation of larger ice crystals. Stabilizers help minimize the negative effects of these cycles.
Hydration
In stabilizer use, hydration is the process by which the ingredient absorbs water and swells or dissolves to perform its function. Proper hydration is essential — whether achieved through heating or cold dispersion — for optimal performance in the final product.
Retrogradation (Syneresis)
Retrogradation refers to the realignment of gelatinized starch molecules, which may cause water to be expelled (syneresis) from the mix. This can affect texture and shelf life. Modified starches and balanced stabilizer blends can help minimize this effect.
Partial Coalescence
Partial coalescence is the controlled clumping of fat globules during churning. Emulsifiers promote this process by displacing proteins from the fat surface, allowing fat globules to stick together and form a network that stabilizes air bubbles. Too little partial coalescence leads to poor air incorporation; too much leads to a greasy, buttery texture.
Overrun
Overrun is the percentage of air incorporated into the ice cream during churning. For example, 50% overrun means the volume has increased by half. Both stabilizers and emulsifiers affect overrun — stabilizers increase mix viscosity (which helps trap air), while emulsifiers promote the fat network that stabilizes air cells. Typical artisan ice cream has 20–40% overrun; commercial ice cream may have 50–100%.