⭐ Plain Kefir (Best Gluten-Free Option)
1 cup plain kefir 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.