Is Sour Cream (Thinned with Water or Milk) a good gluten-free substitute for Buttermilk in Doughnuts?

Yes. Thinning sour cream adjusts thickness to better match buttermilk, preserving batter flow and frying behavior. Use a ratio of 3/4 cup sour cream + 1/4 cup water or milk per 1 cup buttermilk.

Gluten-Free

Gluten-Free Buttermilk Substitute in Doughnuts

2 tested gluten-free options that contains no gluten (safe for celiac disease and gluten sensitivity). Each with exact ratios and tips for Doughnuts.

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Quick Answer

The best gluten-free substitute for Buttermilk in Doughnuts is Plain Yogurt (Thinned with Water) (3/4 cup plain yogurt + 1/4 cup water per 1 cup buttermilk). Thinning yogurt reduces thickness, approximating buttermilk's consistency while providing acidity.

Gluten-Free Buttermilk Substitutes for Doughnuts

Substitute	Ratio	Notes
⭐ Plain Yogurt (Thinned with Water)	3/4 cup plain yogurt + 1/4 cup water per 1 cup buttermilk	Thinning yogurt reduces thickness, approximating buttermilk's consistency while providing acidity.
Sour Cream (Thinned with Water or Milk)	3/4 cup sour cream + 1/4 cup water or milk per 1 cup buttermilk	Thinning sour cream adjusts thickness to better match buttermilk, preserving batter flow and frying behavior.

Detailed Guide: Gluten-Free Buttermilk Substitutes in Doughnuts

⭐ Plain Yogurt (Thinned with Water) (Best Gluten-Free Option)

3/4 cup plain yogurt + 1/4 cup water per 1 cup buttermilk

Quick tip: Thinning yogurt reduces thickness, approximating buttermilk's consistency while providing acidity.

Yogurt contains lactic acid similar to buttermilk, which activates baking soda and tenderizes gluten. Thinning it with water balances the viscosity, preventing overly dense doughnut batter.

Use plain, unsweetened yogurt to avoid flavor interference. Stir well to ensure uniform consistency.

This substitute can slightly increase tanginess and density compared to buttermilk but still produces tender, well-risen doughnuts.

Sour Cream (Thinned with Water or Milk)

3/4 cup sour cream + 1/4 cup water or milk per 1 cup buttermilk

Quick tip: Thinning sour cream adjusts thickness to better match buttermilk, preserving batter flow and frying behavior.

Sour cream is acidic and rich in fat, which can enrich doughnuts but also risks making them dense. Diluting it reduces viscosity and fat concentration, allowing better batter aeration and rise.

Use full-fat sour cream for flavor, and mix thoroughly to avoid lumps. Be mindful of slightly increased fat content affecting frying time.

Compared to buttermilk, sour cream may produce richer but heavier doughnuts with a subtle tang, which some may find desirable.