Skip to main content

Best Buttermilk Substitute in Doughnuts

5 tested options with exact ratios, science-backed explanations, and tips for success.

Quick Answer

The best substitute for Buttermilk in Doughnuts is Milk + Lemon Juice or Vinegar because it replicates the acidity and moisture content critical for proper leavening and tender crumb development.

Top 5 Buttermilk Substitutes for Doughnuts

Substitute Ratio
โญ Milk + Lemon Juice or Vinegar (Best) 1 cup milk + 1 tablespoon lemon juice or white vinegar (let sit 5 minutes)
Plain Yogurt (Thinned with Water) 3/4 cup plain yogurt + 1/4 cup water per 1 cup buttermilk
Sour Cream (Thinned with Water or Milk) 3/4 cup sour cream + 1/4 cup water or milk per 1 cup buttermilk
Evaporated Milk + Lemon Juice or Vinegar 1 cup evaporated milk + 1 tablespoon lemon juice or white vinegar (let sit 5 minutes)
Non-Dairy Milk + Lemon Juice or Vinegar 1 cup unsweetened soy or oat milk + 1 tablespoon lemon juice or white vinegar (let sit 5 minutes)

Detailed Guide: Each Buttermilk Substitute in Doughnuts

Milk + Lemon Juice or Vinegar (Best Option)

1 cup milk + 1 tablespoon lemon juice or white vinegar (let sit 5 minutes)
Nut-Free
Quick tip: Provides the necessary acidity and moisture to activate baking soda, maintaining doughnut texture and rise.

This substitute works by acidifying the milk, mimicking the lactic acid in buttermilk that reacts with baking soda to produce carbon dioxide, which leavens the doughnuts. The acidity also tenderizes gluten, resulting in a softer crumb.

For best results, use whole milk for moisture and richness, and allow the acid to curdle the milk slightly before mixing. Avoid using skim milk as it reduces fat content, affecting texture.

Compared to buttermilk, this substitute yields very similar results in rise and tenderness, with minimal impact on flavor, making it the most reliable replacement in doughnut recipes.

Plain Yogurt (Thinned with Water)

3/4 cup plain yogurt + 1/4 cup water per 1 cup buttermilk
Gluten-Free Nut-Free
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
Gluten-Free Nut-Free
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.

Evaporated Milk + Lemon Juice or Vinegar

1 cup evaporated milk + 1 tablespoon lemon juice or white vinegar (let sit 5 minutes)
Nut-Free
Quick tip: Evaporated milk adds richness and acidity when combined with acid, but is thicker and more concentrated.

Evaporated milk has a caramelized flavor and higher solids than regular milk, which can enrich doughnuts. Adding acid replicates buttermilk's leavening function.

Let the mixture sit to curdle slightly before use. Adjust frying time as the batter may brown faster due to milk sugars.

This substitute yields doughnuts with a richer flavor and slightly denser crumb than buttermilk, but still maintains good rise and tenderness.

Non-Dairy Milk + Lemon Juice or Vinegar

1 cup unsweetened soy or oat milk + 1 tablespoon lemon juice or white vinegar (let sit 5 minutes)
Vegan Dairy-Free Nut-Free
Quick tip: Provides acidity and moisture for vegan or dairy-free doughnuts, though flavor and texture may vary slightly.

Non-dairy milks lack natural acidity but curdle when acidified, mimicking buttermilk's chemical role in leavening. Soy and oat milks have protein content closer to dairy milk, aiding structure.

Use unsweetened varieties to avoid altering doughnut flavor. Allow the acid to react fully before mixing.

Doughnuts made with this substitute may have a slightly different crumb and subtle flavor differences but generally maintain good rise and tenderness.

Vegan Buttermilk Substitutes for Doughnuts

Full Vegan guide โ†’
Non-Dairy Milk + Lemon Juice or Vinegar
Ratio: 1 cup unsweetened soy or oat milk + 1 tablespoon lemon juice or white vinegar (let sit 5 minutes)

Provides acidity and moisture for vegan or dairy-free doughnuts, though flavor and texture may vary slightly.

Gluten-Free Buttermilk Substitutes for Doughnuts

Full Gluten-Free guide โ†’
Plain Yogurt (Thinned with Water)
Ratio: 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)
Ratio: 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.

Dairy-Free Buttermilk Substitutes for Doughnuts

Full Dairy-Free guide โ†’
Non-Dairy Milk + Lemon Juice or Vinegar
Ratio: 1 cup unsweetened soy or oat milk + 1 tablespoon lemon juice or white vinegar (let sit 5 minutes)

Provides acidity and moisture for vegan or dairy-free doughnuts, though flavor and texture may vary slightly.

โŒ What NOT to Use as a Buttermilk Substitute in Doughnuts

Plain Milk

Plain milk lacks the acidity needed to react with baking soda in doughnuts, resulting in a denser texture and less rise. This negatively impacts the light, airy crumb characteristic of good doughnuts.

Yogurt

While yogurt is acidic, its thicker consistency can alter dough hydration and batter viscosity, leading to uneven frying and a heavier doughnut texture. It also may impart a tanginess that overpowers the doughnut's flavor.

Sour Cream

Sour cream's high fat and thickness can disrupt the doughnut batter's balance, causing a denser product with less rise and potentially greasy mouthfeel. Its acidity is also less consistent compared to buttermilk.

Found this helpful? Share it:

Need to substitute other ingredients in Doughnuts?

All substitutes for Doughnuts โ†’

Buttermilk Substitutes in Other Recipes

View all Buttermilk substitutes โ†’