Buttermilk Substitute: 7 Easy Ways to Make It at Home
Yes. You can make a buttermilk substitute in 5 minutes. All you need is milk plus an acid like lemon juice or vinegar. As of October 2026, this is still the method most test kitchens trust. The acid curdles the milk and mimics real buttermilk’s tang and lift in batters.
You are halfway through a pancake batter when you see it. The recipe calls for buttermilk, and your fridge has none. Do not panic, and do not drive to the store. In this guide you will learn 7 reliable ways to make a buttermilk substitute. Every method uses things already in your kitchen. You will get exact ratios, rest times, and honest notes on which method fits baking, frying, and dressings. If you bake gluten free, you get extra guidance too. Buttermilk acid keeps gluten-free bakes moist and tender, so the right swap matters even more for you.
The Fastest Buttermilk Substitute: Milk and Acid in 5 Minutes
Your batter needs acid to react with baking soda, and plain milk has none. Without acid, baking soda never fully activates. Your cake can taste soapy and fall flat.
The fix is simple. Add 1 tablespoon of fresh lemon juice or distilled white vinegar to a measuring cup. Pour in whole milk until the level reaches 1 cup. Stir once and rest it for 5 to 10 minutes. The milk will look slightly curdled. That curdle is your signal that it is ready.
Whole milk gives the richest result. Two percent milk works in a pinch. Avoid skim milk, which turns thin and watery. Sally’s Baking Addiction tested this method side by side with real buttermilk in muffins and biscuits. The DIY version came very close to the real thing.
- Pour 1 tablespoon lemon juice or white vinegar into a liquid measuring cup.
- Add whole milk until the mixture reaches the 1-cup line.
- Stir gently and rest 5 to 10 minutes until lightly curdled.
- Stir again and use it exactly like store-bought buttermilk.
Scaling is easy. For half a cup, use 1 and 1/2 teaspoons of acid. For 2 cups, use 2 tablespoons of acid.
Can I Just Use Regular Milk Instead of Buttermilk?
No, not when the recipe relies on baking soda. Plain milk lacks the acid that reacts with baking soda to create lift. Without it, your bake can turn dense and taste slightly soapy. Use a buttermilk substitute with lemon juice or vinegar instead. The added acid restores the lift, tang, and tender crumb the recipe was built around.
6 More Ways to Make a Buttermilk Substitute
The milk and acid trick is the fastest option, but it is not the only one. These 6 methods cover yogurt, sour cream, kefir, pantry staples, and dairy-free picks. Choose based on what is already in your fridge.
1. Plain Yogurt
Use 1 cup of plain yogurt for 1 cup of buttermilk. Thin it with a splash of milk or water if it is very thick. Greek yogurt works too, but whisk in 2 to 3 tablespoons of milk per cup. The tang is close to real buttermilk. This method shines in pancakes and quick breads.
2. Sour Cream
Mix 3/4 cup full-fat sour cream with 1/4 cup water or milk. This gives you 1 cup. The result is rich and thick. It is a great pick for cakes and muffins where you want a soft, cakey crumb. Sour cream also gives my gluten free cheesecake its creamy body, so the flavor already fits this kitchen.
3. Kefir
Use plain kefir as a 1 to 1 swap. No measuring tricks are needed. Kefir is a cultured, drinkable yogurt with live cultures and a natural tang. It behaves much like real buttermilk in batters. Many bakers call it the laziest buttermilk substitute because you simply pour and go.
4. Cream of Tartar
Add 1 and 3/4 teaspoons of cream of tartar to 1 cup of milk. Stir well to break up clumps, then rest for 5 minutes. Cream of tartar is a dry acid from winemaking, so it adds tang without extra liquid flavor. This method suits bakers who dislike the smell of vinegar.
5. Buttermilk Powder
Mix 1/4 cup buttermilk powder with 1 cup of water. Or stir the powder into your dry ingredients and add the water with the wet ones. The powder keeps for months in the pantry. SACO Foods makes the best-known version, a cultured buttermilk blend from real sweet cream. Their facility is certified gluten-free and nut-free, which is rare for a dairy powder.
6. Dairy-Free and Vegan
Add 1 tablespoon of lemon juice or white vinegar to 1 cup of unsweetened soy milk. Almond and oat milk work too. Rest 5 to 10 minutes. Soy milk curdles best because it has more protein. Always pick unsweetened and unflavored milk. Sweetened vanilla almond milk will flavor your whole bake.
The Cheat Sheet: Pick Your Method in 30 Seconds
Not sure which method to grab? Match your situation to a row. Each one makes 1 cup.
| Method | Ratio per 1 cup | Best for | Gluten-free note |
|---|---|---|---|
| Milk + lemon or vinegar | 1 tbsp acid + milk to 1 cup | Cakes, biscuits, pancakes | Works in GF batters too |
| Plain yogurt | 1 cup, thinned as needed | Pancakes, quick breads | Check label for additives |
| Sour cream | 3/4 cup + 1/4 cup milk | Muffins, cakes | Naturally gluten free |
| Kefir | 1 to 1 swap | Scones, cupcakes | Pick plain, unflavored |
| Cream of tartar | 1 3/4 tsp + 1 cup milk | Vinegar haters | Naturally gluten free |
| Buttermilk powder | 1/4 cup + 1 cup water | Pantry backup | SACO is certified gluten-free |
| Dairy-free milk | 1 tbsp acid + 1 cup soy/almond | Vegan bakes | Soy curdles best |
Which Buttermilk Substitute Works Best in Gluten-Free Baking?
Here is the short answer: any acidic one. Gluten-free flours have no gluten to build structure, so they depend on other helpers for lift and softness. The acid in a buttermilk substitute does two jobs at once. It wakes up baking soda for rise, and it softens tough starches for a tender crumb.
The milk and lemon juice method is my top pick for GF recipes. It is cheap, fast, and reliably acidic. Kefir is a close second. Yogurt works well in GF pancakes. One warning: skip plain milk. A gluten-free batter made with plain milk and baking soda can turn gummy. That is the exact texture problem my gluten free donuts guide helps you avoid.
Acid-rich dairy is also one reason my gluten free banana loaf stays moist for a full week. As of October 2026, plain cultured buttermilk remains one of the simplest naturally gluten-free dairy picks. It is a staple worth keeping in any GF kitchen. Just buy it plain, which brings us to the label check.
The 30-Second Label Check That Decides If Your Buttermilk Is Truly Gluten Free
Most people grab buttermilk without reading the carton. That is usually fine for plain cultured buttermilk, which is naturally gluten free. The risk hides in the flavored, low-fat, and light versions.
Some brands add modified food starch, gums, or natural flavors to improve texture. Modified food starch can come from wheat. In the United States the FDA published its final rule in August 2013. A food labeled gluten-free must contain less than 20 parts per million of gluten. That rule protects you, but only if you read the label.
Run this 30-second check before you buy:
- Choose plain, unflavored buttermilk first.
- Scan the ingredient list for wheat, barley, rye, malt, or modified food starch.
- Look for a certified gluten-free mark on the carton.
- Check the contains statement for milk and wheat allergens.
- Recheck the label every few months, because recipes change.
Certified gluten free vs labeled gluten free
Naturally gluten free means the food has no gluten ingredients, like plain milk. Labeled gluten free means the maker claims it meets the FDA 20 ppm limit. Certified gluten free means an outside group tested the product. The Gluten-Free Certification Organization (GFCO) is one such group, and it also audits the plant. For celiac safety, certified is the strongest claim.
A March 2026 Celiac Disease Foundation announcement put it plainly. Celiac disease affects about 1 in 100 people worldwide. An estimated 70 to 80 percent of cases remain undiagnosed. If gluten affects your health, talk with your doctor or a registered dietitian before changing your diet. And always check the current label, because brands reformulate without warning. My guide to gluten-free foods and snacks lists more dairy aisle picks that are truly safe.
Is Buttermilk Gluten Free?
Yes, plain buttermilk is naturally gluten free because it is only cultured milk. Flavored or low-fat versions can contain added starches, so always read the label. Choose cartons marked gluten-free or certified gluten-free if you have celiac disease. As of October 2026, most major plain buttermilk brands remain naturally gluten free.
Can You Freeze a Buttermilk Substitute?
Yes, and you should. Real buttermilk keeps about 2 weeks past its printed date in the fridge. Pour leftovers into an ice cube tray and freeze. Then move the cubes to a freezer bag. Each cube is about 1 tablespoon. Frozen buttermilk keeps up to 3 months. Thaw it in the fridge and whisk before using.
A homemade milk and acid version keeps as long as the milk you made it from. Check the milk’s date and use that as your guide. Do not refreeze thawed cubes.
Frequently Asked Questions
Can I use apple cider vinegar instead?
Yes. Use 1 tablespoon per cup of milk, the same as white vinegar. It can add a faint fruity note, so white vinegar or lemon juice is better for delicate cakes.
Can I use skim or low-fat milk?
You can, but whole milk works best. Skim milk makes a thin, watery substitute with less richness. If 2 percent is all you have, use it. The bake will still beat plain milk.
How long does a homemade buttermilk substitute last in the fridge?
Use the milk’s expiration date as your guide. Make it fresh when you can. Stir before using, since the curds settle to the bottom.
Can I freeze it?
Yes. Freeze real or homemade buttermilk in ice cube trays for up to 3 months. Thaw overnight in the fridge and whisk well before baking.
Does it taste like real buttermilk?
Close, but not identical. The milk and acid version has the right tang and acid for baking. In side-by-side tests, bakers could barely tell the difference in muffins and biscuits.
Which method is best for pancakes?
Plain yogurt or the milk and lemon juice method. Both give fluffy, tender pancakes with golden edges. Kefir is excellent too.
Can I make a buttermilk substitute with almond milk?
Yes. Use unsweetened almond milk with 1 tablespoon of lemon juice per cup. Soy milk curdles better, but almond works for most bakes.
Is cream of tartar or vinegar better?
Vinegar and lemon juice give a cleaner tang and curdle faster. Cream of tartar is odorless, which some bakers prefer. Both work well, so pick what you have.
Can I use Greek yogurt as a buttermilk substitute?
Yes. Thin 1 cup of Greek yogurt with 2 to 3 tablespoons of milk or water. It is thicker than regular yogurt, so do not skip the thinning step.
Why did my milk not curdle?
Ultra-pasteurized or very cold milk curdles slowly. Let it rest the full 10 minutes at room temperature. A few small curds are enough. It does not need to look like cottage cheese.
Can I use a substitute when a recipe needs 2 cups of buttermilk?
For large amounts, real buttermilk gives better flavor and texture. The DIY version works, but the difference grows past 1 cup. Keep a can of buttermilk powder for big recipes.
Is buttermilk powder gluten free?
Plain buttermilk powder is naturally gluten free. SACO Foods makes a cultured buttermilk blend in a certified gluten-free and nut-free facility. Still, check the current label before buying.
Can I use it for fried chicken or ranch dressing?
Yes for marinades. The acid tenderizes chicken well. For ranch dressing served cold, real buttermilk tastes better. The DIY version can taste thin when uncooked.
What is the difference between buttermilk and soured milk?
True buttermilk is cultured with live bacteria, like yogurt. Soured milk is just milk plus an acid. The DIY version is technically soured milk, but it works the same in most baking.
The Bottom Line
A buttermilk substitute takes 5 minutes and one acid you already own. Milk with lemon juice or vinegar handles most recipes. Kefir and yogurt cover you when the fridge is nearly empty. Buttermilk powder saves big baking days. For gluten-free baking, pick an acidic method and read every label. The right acid keeps your crumb tender and your kitchen safe. Grand View Research estimates the global gluten-free market at 9.3 billion dollars in 2026. Expect more certified options every year. Keep this guide bookmarked, and you will never skip a recipe for missing buttermilk again. Browse my best gluten free desserts next time you need a recipe worth the effort.
Curious about the traditional kind? Read the full story of buttermilk and how it was first made.
