Dairy
Vegan alternative to buttermilk: the best substitutes
Everything you need to replace buttermilk with a plant-based substitute — which one to use, the exact ratio, and the mistakes that ruin the result.
Short answer
Key takeaways
- Best all-round swap: Soy milk + 1 tbsp lemon juice per cup (pancakes, biscuits, soda bread).
- Ratio: 1:1 after resting the acidulated milk 5 minutes.
- Pro tip: Soy curdles most reliably; oat and almond stay thin and give a flatter crumb.
- 2 vegan alternatives to compare for buttermilk.
Why buttermilk isn't vegan
A dairy by-product of churning butter.
Best vegan substitutes
| Substitute | Best for |
|---|---|
| Soy milk + 1 tbsp lemon juice per cup | Pancakes, biscuits, soda bread |
| Plant yogurt thinned with water | Marinades and fried coatings |
How to substitute buttermilk, step by step
- 1
Pick the right substitute for the job
For most recipes use Soy milk + 1 tbsp lemon juice per cup — pancakes, biscuits, soda bread. If you need a different texture, Plant yogurt thinned with water works for marinades and fried coatings.
- 2
Measure using the correct ratio
1:1 after resting the acidulated milk 5 minutes. Weigh rather than eyeball it — small errors show up much faster when replacing buttermilk.
- 3
Adjust the method
Soy curdles most reliably; oat and almond stay thin and give a flatter crumb.
- 4
Taste and correct
Plant swaps are usually a little less salty and less rich than buttermilk. Season at the end and add acid (lemon, vinegar) or umami (miso, nutritional yeast) if the dish tastes flat.
Mistakes to avoid
- Swapping by volume when the recipe measures buttermilk by weight — check the ratio above first.
- Using a sweetened or flavoured version in a savoury recipe.
- Ignoring the method change: Soy curdles most reliably; oat and almond stay thin and give a flatter crumb.
- Assuming every packaged product labelled "plant-based" is vegan — some still contain milk powder, honey or egg. Scan the barcode to be sure.
Conversion ratio
1:1 after resting the acidulated milk 5 minutes.
Pro tip
Soy curdles most reliably; oat and almond stay thin and give a flatter crumb.
Replace the job, not just the ingredient
An egg can bind a burger, enrich a cake or create the foam in a meringue. Those jobs need different substitutes: ground flaxseed can help with binding, while aquafaba is useful for whipping.
Review the rewritten method as well as the ingredient list. Changing the amount of liquid, the cooking temperature or the resting time can matter as much as the substitute itself.
- A practical example
- For a creamy pasta, try unsweetened plant cream or blended silken tofu; add acidity and seasoning to taste rather than relying on a cheese substitute alone.
- What to keep in mind
- Substitutions can change allergens, texture and nutrition. Test a small batch before making a dish for guests.
Frequently asked questions
- What is the best vegan alternative to buttermilk?
- Soy milk + 1 tbsp lemon juice per cup is the closest all-round swap — pancakes, biscuits, soda bread. 1:1 after resting the acidulated milk 5 minutes.
- Why isn't buttermilk vegan?
- A dairy by-product of churning butter.
- How much do I use instead of buttermilk?
- 1:1 after resting the acidulated milk 5 minutes.
- Any tips for getting it right?
- Soy curdles most reliably; oat and almond stay thin and give a flatter crumb.
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