5 Best Buttermilk Substitutes for Sugar Cookies

Quick tip: This mixture closely mimics buttermilk's acidity and moisture, preserving cookie tenderness and rise.

Milk combined with lemon juice creates a mildly acidic environment similar to buttermilk, which activates baking soda to produce carbon dioxide for leavening. The acidity also tenderizes gluten, resulting in a soft crumb.

For best results, use whole milk for moisture and richness, and allow the mixture to sit for at least 5 minutes to curdle properly. Stir gently before adding to the dough.

Compared to original buttermilk, this substitute yields nearly identical texture and flavor, maintaining the balance of tenderness and slight tang that enhances sugar cookies.

Quick tip: Similar to lemon juice, vinegar acidifies milk to mimic buttermilk's effects, though it may impart a slightly sharper tang.

White vinegar acidifies milk, causing it to curdle and replicate buttermilk's acidity necessary for chemical leavening. This reaction helps activate baking soda and tenderizes the dough.

Allow the mixture to rest for 5-10 minutes before use to ensure proper curdling. Use whole milk for best moisture and texture.

The final cookie will have a texture and rise close to those made with buttermilk, though the flavor may be marginally more acidic, which some may notice in delicate sugar cookies.

Quick tip: Kefir provides acidity and moisture similar to buttermilk but may introduce a slight fermented flavor.

Kefir is a fermented milk product naturally acidic, which activates baking soda and tenderizes gluten similarly to buttermilk. Its thinner consistency helps maintain dough hydration.

Choose plain, unsweetened kefir to avoid altering sweetness. The fermented notes can complement sugar cookies but may be noticeable to sensitive palates.

Texture and rise will be comparable to buttermilk, though flavor may be slightly tangier and more complex.

Quick tip: This substitute is richer and thicker, which can add moisture but may slightly alter cookie texture.

Evaporated milk has a concentrated milk solids content and, when acidified with lemon juice, provides acidity and moisture similar to buttermilk. The higher protein and fat content can enrich the dough.

Let the mixture sit to curdle before use. Because evaporated milk is thicker, you may need to slightly adjust other liquid ingredients to maintain dough consistency.

Cookies may be softer and slightly denser than those made with buttermilk, with a richer mouthfeel but still tender crumb.

Quick tip: A dairy-free alternative that provides acidity and moisture but may impart a subtle bean flavor.

Soy milk acidified with lemon juice curdles similarly to dairy milk, creating an acidic liquid that activates baking soda and tenderizes gluten. This makes it a suitable vegan and dairy-free substitute.

Use unsweetened soy milk to avoid flavor interference. Allow the mixture to sit to ensure proper curdling.

The final cookie texture will be close to buttermilk versions, though the flavor may have a slight beany note that could affect the delicate sweetness of sugar cookies.