What can I substitute for buttermilk?

By Paulo de VriesLast verified 2026-05-204 sources~6 min readhigh consensus

Quick milk-acid swap: 1 cup milk + 1 tbsp white vinegar OR lemon juice; let sit 5-10 min until curdled. Other 1:1 substitutes: plain yogurt (thinned with milk), kefir, sour cream + milk, milk + cream of tartar (1.75 tsp/cup). Avoid: low-fat milk without acid (won't replicate tang or chemistry).

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The full answer

Buttermilk substitutions are among the most common baking workarounds because real buttermilk has a short shelf life and isn't always stocked. The good news: buttermilk's two key roles (acid + thickness) can be replicated with kitchen staples. The acid activates baking soda + tenderizes gluten; the thickness affects texture. Different substitutes hit these notes differently.

**Why buttermilk matters in recipes:**

1. **Acid (pH ~4.6):** activates baking soda for rise, neutralizes alkaline taste 2. **Tang:** distinctive sour flavor in biscuits, pancakes, fried chicken brine 3. **Tenderness:** acid weakens gluten, producing soft tender crumb 4. **Moisture + fat:** adds richness without being heavy

A good substitute matches the acid level. A great substitute also matches the thickness + tang.

**The classic milk + vinegar/lemon method (best universal substitute):**

**Recipe:** - **1 cup milk** (whole, 2%, or skim) - **1 tablespoon white vinegar OR fresh lemon juice** - Stir + let sit **5-10 minutes** until curdled

**Why it works:** - Acid (vinegar/lemon) drops milk pH to ~4.5-4.7 (matches buttermilk) - Casein proteins begin to curdle (similar texture to buttermilk) - Activates baking soda the same way

**Ratios for different recipes:** - **1 cup substitute:** 1 cup milk + 1 tbsp vinegar/lemon - **1/2 cup:** 1/2 cup milk + 1.5 tsp vinegar/lemon - **1/4 cup:** 1/4 cup milk + 3/4 tsp vinegar/lemon

**Best uses:** pancakes, biscuits, quick breads, marinades, cakes

**Other 1:1 substitutes (use cup-for-cup):**

**Plain yogurt (thinned with milk):** - **3/4 cup plain whole-milk yogurt + 1/4 cup milk** (whisk to combine) - **Pros:** thicker texture closer to buttermilk - **Best for:** cakes, biscuits, marinades - **Note:** use plain (unsweetened) yogurt only

**Kefir:** - **1:1 substitute** (kefir is already similar to buttermilk) - **Pros:** identical tang + thickness + probiotic culture - **Best for:** all buttermilk applications

**Sour cream + milk:** - **3/4 cup sour cream + 1/4 cup milk** whisked - **Pros:** rich + tangy - **Cons:** higher fat than buttermilk; may need to adjust

**Greek yogurt + milk:** - **1/2 cup Greek yogurt + 1/2 cup milk** whisked - **Pros:** good thickness, mild tang - **Best for:** baked goods, dressings

**Plant-based milk + acid (vegan):** - **1 cup soy/almond/oat milk + 1 tbsp vinegar/lemon** - **Pros:** works for plant-based baking - **Note:** results vary by plant milk; soy curdles best

**Cream of tartar + milk:** - **1 cup milk + 1.75 tsp cream of tartar** (stir until dissolved) - **Pros:** no vinegar smell, clean tang - **Best for:** delicate cakes where vinegar might interfere

**By recipe type:**

**Biscuits + scones:** - **Best:** milk + vinegar (1 cup milk + 1 tbsp vinegar) - **Alternative:** 3/4 cup yogurt + 1/4 cup milk - Acid activates baking powder/soda for lift

**Pancakes + waffles:** - **Best:** milk + vinegar (same ratio) - **Alternative:** kefir (1:1) - Vinegar gives the classic buttermilk pancake tang

**Cakes (red velvet, chocolate, devil's food):** - **Best:** milk + vinegar (1:1) - **Alternative:** Greek yogurt thinned 1:1 with milk - Buttermilk reacts with cocoa to enhance red color

**Fried chicken marinade:** - **Best:** milk + vinegar (or buttermilk directly) - **Alternative:** yogurt thinned with milk - **Time:** 4-24 hours

**Salad dressings (ranch, blue cheese):** - **Best:** milk + vinegar OR kefir - **Alternative:** sour cream + milk - Match tang for authentic flavor

**Cornbread:** - **Best:** milk + vinegar (1:1) - Critical for activation of baking soda

**Vegan baking:** - **Best:** soy milk + apple cider vinegar (1:1) - Soy curdles best of plant milks - Almond/oat work but less curdling

**Special considerations:**

**Cake recipes with both baking soda + baking powder:** - Buttermilk's acid activates baking soda - Substitute must have similar acid - Don't substitute milk alone (lacks acid; recipe won't rise)

**Recipes asking for "1 cup buttermilk powder":** - **Substitute:** 1/4 cup powdered buttermilk + 1 cup water - **Or:** 1 cup regular buttermilk substitute (above methods)

**Cultured buttermilk vs traditional:** - Modern "buttermilk" is cultured milk - Traditional buttermilk was leftover liquid from butter churning - Both have similar pH + acid; modern substitutes match cultured

**Dairy-free / vegan substitutes:**

**Soy milk + vinegar (best vegan option):** - 1 cup soy milk + 1 tbsp white vinegar - Curdles better than other plant milks - Best mimics dairy buttermilk

**Almond milk + vinegar:** - 1 cup almond milk + 1 tbsp white vinegar - Less curdling but acidity matches - Works in most recipes

**Coconut milk + lemon:** - 1 cup coconut milk (canned, full-fat) + 1 tbsp lemon juice - Rich + slightly tropical flavor - Best for: pancakes, biscuits, fried chicken (Caribbean style)

**Oat milk + vinegar:** - 1 cup oat milk + 1 tbsp vinegar - Mild flavor, decent curdling - Works in baked goods

**Cashew milk + lemon:** - 1 cup cashew milk + 1 tbsp lemon juice - Creamy + neutral - Good in dressings + dips

**What to avoid:**

**Don't substitute:** - **Plain milk alone:** lacks acid; recipe won't rise properly - **Milk + lemon if recipe has color sensitivity:** lemon can affect color - **Heavy cream alone:** too thick + fatty - **Half-and-half:** acceptable in pancakes but not biscuits (different chemistry) - **Sweet/flavored yogurt:** added sugar throws off recipe

**Common mistakes:**

- **Skipping the rest time:** acid needs 5-10 min to curdle the milk - **Using too little acid:** 1 tsp instead of 1 tbsp doesn't activate baking soda - **Using flavored yogurts:** sweet, vanilla, fruit alter flavor - **Substituting in 100% buttermilk recipes without adjustment:** richer recipes may need thicker substitute

**The science: pH matching**

Buttermilk pH: ~4.6 Substitute pH targets: - Milk + 1 tbsp vinegar: 4.5-4.8 ✓ - Yogurt + milk: 4.5-4.7 ✓ - Kefir: 4.5-4.8 ✓ - Sour cream + milk: 4.7-5.0 ✓ - Cream of tartar method: 4.6-4.8 ✓ - Plain milk alone: 6.4-6.7 ✗ (too alkaline)

The pH match is what determines the substitute's effectiveness.

**Cross-reference:** see /pages/how-long-does/milk-last for buttermilk shelf life + /pages/what-ratio-of/baking-soda-to-baking-powder for related chemistry + /pages/how-to-convert/cups-to-grams for ingredient weights.

Most published references (King Arthur Baking, Cook's Illustrated, J. Kenji López-Alt "The Food Lab", America's Test Kitchen, "On Food and Cooking" by Harold McGee) converge on milk + vinegar/lemon as the universal substitute, with yogurt-based substitutes preferred for thicker applications.

Time ranges by condition

Condition	Duration	Note
Quick milk-acid (1 cup milk + 1 tbsp vinegar/lemon)	5-10 min curdling	—
Yogurt + milk (3/4 + 1/4)	Whisk + use immediately	—
Kefir 1:1	Use directly	—
Cream of tartar + milk	1.75 tsp cream of tartar per cup milk	—
Vegan: soy milk + vinegar	1 cup + 1 tbsp, 5-10 min	—

What changes the time

Acid type. Vinegar = cleaner; lemon = brighter flavor; cream of tartar = neutral
Fat content. Whole milk closest to buttermilk; skim works but less rich
Rest time. 5-10 min curdling is essential — don't skip
Recipe type. Biscuits + pancakes: milk-vinegar method; cakes: same; marinades: yogurt-thinned works best
Vegan needs. Soy milk curdles best with vinegar; oat + almond work but less curdling

Common questions

Why does my recipe need to rest after adding vinegar to milk?

The acid (vinegar or lemon) needs 5-10 minutes to lower the milk's pH from ~6.5 to ~4.6, which causes the casein proteins to curdle slightly — replicating buttermilk's texture. More importantly, the acid needs to be active before adding to dry ingredients to activate the baking soda. Skipping the rest means the recipe won't rise as much. The mixture will look slightly curdled or grainy when ready — this is correct.

Can I use lactose-free milk to make buttermilk substitute?

Yes — lactose-free milk + vinegar/lemon works exactly the same way. The lactose has been broken down but the casein proteins (which curdle with acid) are still present. Use 1 cup lactose-free milk + 1 tbsp vinegar/lemon, rest 5-10 min. Same chemistry, same result. Works for plant-based milks too (soy curdles best).

What's the difference between modern buttermilk and traditional buttermilk?

Modern store-bought buttermilk is "cultured buttermilk" — pasteurized milk with live cultures (Lactococcus, Leuconostoc) added to produce acid. Traditional buttermilk was the liquid left over from butter churning (now rare commercially). Both have similar pH (~4.6) and similar use in cooking. The milk + vinegar substitute matches the modern cultured version, which is what virtually all recipes assume.

Sources

We cite primary research, expert practice, and authoritative reference. Higher-tier sources weighted heavier. See methodology.

Tier 1 · peer-reviewed / governmentalTier 2 · editorial referenceTier 3 · named practitioner

T2King Arthur Baking — Established baking authority on buttermilk substitutes
T2Cook's Illustrated / America's Test Kitchen — Tested buttermilk substitutes with sensory + chemistry comparisons
T3J. Kenji López-Alt, "The Food Lab" — Scientific framework for buttermilk substitution + acid activation
T3Harold McGee, "On Food and Cooking" — Dairy chemistry + acid-protein interactions

Why this page existsThis page exists because “What can I substitute for buttermilk?” is one of the recurring questions we measure across search queries + LLM crawls + reading depth. When enough asking accumulated, we wrote this answer with sources cited. The mechanism is the trust signal — see how it works.

What could change this answer

honest uncertainty

We don’t know your specific equipment, ingredient batch, or environment. This answer is the best directional estimate from cited sources. Here’s where it’s less certain:

5 factors shift the answer. Your specific acid type, fat content, rest time (and more) can move this estimate in either direction. The table below shows the documented ranges.
Range spans 5 documented conditions. Pick the row that matches your scenario; halfway between two rows is your best estimate. The widest condition you can imagine is the safer upper bound.
Treat as a directional starting point. Real-world equipment, ingredient batch, and ambient conditions cause natural variance the table cannot capture. Use sensory checks (sight, smell, touch, internal temperature when relevant) alongside this answer — not instead of it.
Backed by 4 cited sources — verify if precision matters. See the Sources section for primary references. Cross-check the cited materials when stakes are high: commercial production, food safety, allergens, dietary or medical considerations.
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de Vries, P. (2026). What can I substitute for buttermilk?. AskedWell. Retrieved 2026-05-21, from https://askedwell.com/pages/what-substitute-for/buttermilk

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Last verified: 2026-05-20 · Published 2026-05-20

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