This low-cal substitute for heavy cream is a simple cooked mixture of 2% milk and cornstarch, made to add body to soups, sauces, and other savory dishes. It thickens without the high fat content of cream, though it will not whip or taste quite as rich, so it works best in recipes where cream is stirred into a cooked dish.

Ingredients

1 cup (240 ml) 2% milk, divided; use cold milk for the cornstarch slurry. Whole milk makes a richer, slightly higher-calorie substitute, while skim milk makes a thinner-tasting one.
1 tablespoon (8 g) cornstarch, for thickening. Measure level rather than heaping so the finished mixture does not become gummy.

This recipe makes about 1 cup (240 ml), enough to replace approximately 1 cup of heavy cream in a soup or sauce. For the smoothest result, use plain, unflavored milk and cornstarch. The mixture is intentionally neutral, so it can take on the seasonings in the recipe where you use it.

Instructions

Make a smooth slurry. Pour 2 tablespoons (30 ml) of the measured cold milk into a small bowl. Add the cornstarch and whisk until no dry lumps remain. Set the slurry beside the stove while you warm the rest of the milk. Mixing the starch with cold liquid first helps it disperse evenly instead of forming little lumps in hot milk.
Warm the remaining milk. Pour the other 14 tablespoons (210 ml) of milk into a small saucepan. Set it over medium-low heat and warm for about 2 minutes, stirring once or twice. The milk should be hot and steamy but not boiling. If it begins to bubble around the edges, lower the heat.
Thicken the mixture. Whisk the slurry again, then slowly pour it into the warm milk while whisking continuously. Cook for about 2 minutes, stirring across the bottom and into the corners of the pan, until the mixture lightly coats the back of a spoon. Keep the heat gentle; a hard boil can make the texture uneven or cause milk to scorch.
Use or cool. Take the pan off the heat as soon as the mixture thickens. Use it warm in a recipe, or transfer it to a clean container to cool if you are preparing it ahead. It will thicken a little more as it cools, so judge the consistency while it is warm rather than cooking it until very thick.

Tips

Whisk the slurry immediately before adding it. Cornstarch settles quickly at the bottom of the bowl. A quick re-whisk prevents a concentrated blob of starch from landing in the pan and helps the mixture thicken consistently.
Use gentle heat and keep stirring. Milk can scorch on the bottom of a small saucepan, and starch can clump if it hits hot liquid without being whisked. Medium-low heat and steady whisking are more reliable than turning up the burner to speed things along.
Add it near the end of cooking. When using this in soup or sauce, stir it in during the final few minutes and heat gently. Prolonged boiling can weaken the starch-thickened texture. If the dish is already very hot, whisk a little of its liquid into the substitute first to temper it, then stir the mixture back into the pot.
Keep the intended use in mind. This is a thickening substitute, not a direct replacement for cream’s fat in every recipe. It will not whip into peaks, and it may not give baked goods the same tender, rich texture. Use it where cream contributes mainly smoothness and body, rather than relying on it for whipping or a high-fat structure.

Serving Suggestions

Use the mixture as a one-for-one substitute for heavy cream in creamy vegetable soups, such as potato, cauliflower, or broccoli soup. Stir it in toward the end, then warm the soup gently until it is hot and cohesive. It adds a creamy-looking body without making the soup as rich as a version finished with heavy cream. If your soup is already thick, start with three-quarters of the substitute and add more only if it needs it.

It also works in pan sauces for pasta, chicken, or vegetables when the recipe needs a little thickness. Stir it into the sauce after the other ingredients are cooked, and season afterward because milk softens the impression of salt, pepper, and spices. For pasta, reserve some cooking water: a splash can loosen the sauce if the starch mixture makes it too thick. It can also be stirred into a mild curry or casserole sauce, although the result will be less rich and less glossy than one made with cream.

For a small batch of macaroni and cheese or a creamy rice dish, add it gradually and taste as you go. A recipe that depends on cream for a distinct buttery flavor may need a little extra seasoning or a small amount of butter or olive oil. That addition is optional and will increase the calories, so it is best treated as a flavor adjustment rather than part of the base substitute.

Variations

For a richer result: Make the recipe with whole milk instead of 2% milk. It remains much lighter in texture and fat than heavy cream, but tastes fuller. The amount of cornstarch stays the same. This is a useful middle ground when a thin, mild sauce would not suit the dish.

For a dairy-free version: Use an unsweetened, unflavored oat beverage or soy beverage in place of the milk, keeping the same quantities. Oat beverage tends to taste mild and slightly sweet; soy beverage can have a more noticeable flavor. Choose a product labeled unsweetened, and expect the color, flavor, and thickening behavior to vary by brand. Avoid sweetened vanilla varieties in savory food.

For a tangy, creamy finish: Plain Greek yogurt can work in some soups and sauces, but it is not a direct equivalent to this recipe. Thin a few spoonfuls with warm liquid from the dish, remove the pan from the heat, and stir the yogurt in gradually. It adds a tangy note and can curdle if boiled, so it is better for gentle finishing than for simmering.

For a thinner substitute: If the finished mixture is thicker than you need, whisk in milk a tablespoon (15 ml) at a time while it is warm. For a thicker mixture, return it to low heat for a short time while stirring; avoid adding dry cornstarch directly to the pan, which is likely to leave lumps.

Storage and Reheating

Cool the mixture promptly and refrigerate it in a covered container within 2 hours of cooking. Keep it refrigerated and use it within 3 to 4 days. The starch may settle or the mixture may set more firmly as it chills; this is normal. Stir or whisk it before using, and add a small splash of milk if it needs loosening.

Reheat only the amount you need in a small saucepan over low heat, whisking frequently until smooth and steaming. For a microwave, heat in short intervals and stir well between them so the mixture warms evenly. As with other leftovers, reheat to 165°F (74°C), checking with a food thermometer. Do not let it boil vigorously, since extended boiling can make the texture less dependable. Discard it if it has been left at room temperature for more than 2 hours, or if it develops an off smell or appearance. You can freeze it, but separation and a grainy texture after thawing are common, so refrigeration is the better choice for this small batch.

Frequently Asked Questions

Can I use this in any recipe that calls for heavy cream?

No. It is most reliable in soups, sauces, and other cooked dishes where cream mainly thickens or smooths the liquid. Heavy cream has considerably more fat, so it behaves differently in whipped toppings, ganache, ice cream, custards, and many baked goods. In those recipes, replacing the cream with milk and cornstarch can change the structure as well as the flavor.

Can this substitute be whipped?

No. The mixture does not contain enough fat to trap air and form stable whipped peaks. Chilling it will make it firmer, but it will not turn into whipped cream. For a topping that needs to hold its shape, use a recipe specifically designed for a lower-fat whipped topping rather than relying on this thickened milk mixture.

Can I stir the milk and cornstarch together without cooking them first?

You can mix them cold, but the cornstarch will not thicken a sauce properly until it is heated. Cooking the mixture briefly activates the starch and lets you check its consistency before adding it to a finished dish. If you add a cold slurry directly to a pot, it still needs enough gentle heating to thicken, and it is easier to get a smooth result when you whisk carefully.

Why did my mixture turn lumpy or too thick?

Lumps usually form when the cornstarch was not mixed with cold milk first, or when the slurry was poured into hot milk without continuous whisking. If it is only slightly lumpy, whisk briskly or pass it through a fine-mesh strainer. If it is too thick, whisk in milk a tablespoon (15 ml) at a time. Next time, use a level measure of cornstarch and stop cooking once the mixture coats a spoon.

Will this work in coffee?

It is not the best choice for coffee. The starch can leave a slightly thick or pasty mouthfeel, and the milk may react poorly in strongly acidic coffee. Use plain milk, a coffee creamer, or another product intended for coffee instead. The recipe is designed for dishes that benefit from cooked starch, such as a sauce or soup.

Can I make a larger batch?

Yes. Multiply both ingredients by the same amount and make the slurry in a separate bowl before warming the milk. A larger quantity may take longer to heat, so rely on the texture rather than the exact timing: whisk until it lightly coats a spoon, then remove it from the heat. Store extra in a covered container in the refrigerator and use it within 3 to 4 days.

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Low-Cal Substitute for Heavy Cream in Sauces and Soups