Baking

Vegan substitute for Buttermilk

Key facts

Replaces
Buttermilk
Category
Baking
Options here
3 tested swaps
Easiest swap
Soy milk + lemon — 240 ml + 1 tbsp lemon juice

Options, ratios and best uses

Soy milk + lemon

240 ml + 1 tbsp lemon juice

Rest 10 minutes until it curdles.

Best for: pancakes, scones, cakes

Soy milk + vinegar

240 ml + 1 tbsp cider vinegar

Neutral flavour; the most reliable curdle.

Best for: cornbread, soda bread

Plant yoghurt thinned

3 parts yoghurt : 1 water

Thicker result, extra tang.

Best for: marinades, rich cakes

Tips

  • Soy and pea milks curdle best — almond barely does
  • Use within 30 minutes of mixing
  • Keep the soda in the recipe: it needs the acid

Avoid

  • Using sweetened vanilla milk in savoury bakes
  • Substituting with plain plant milk and no acid

Questions people ask

Why does my almond buttermilk not curdle?

Low protein. Switch to soy or pea milk for visible curdling.

Does it change the taste?

Barely — the acid is neutralised by the baking soda in the oven.

Related swaps

Reviewed 2026-09-16 by the Veg.ac editorial team · Free to reuse under CC BY 4.0 with a link back.

Go deeper

What you are actually replacing

Swapping Buttermilk well is a food-science problem before it is a shopping problem. The original ingredient is doing a specific job — binding, aerating, browning, adding fat, adding salt or adding structure — and the best replacement is the one that does that same job, not the one that sounds closest on the label. Once you can name the job, the choice between Soy milk + lemon, Soy milk + vinegar, Plant yoghurt thinned becomes obvious.

How to choose between the options

  • Start from the dish, not the product. A swap that is perfect in a cake can be wrong in a sauce.
  • Match fat and water content first; texture failures are usually a moisture problem, not a flavour one.
  • Season and taste at the same point in the recipe where you would have tasted the original.
  • Expect the first attempt to be about eighty per cent right, and adjust one variable at a time.
  • Keep one reliable default in the cupboard so the swap is never a reason to abandon a recipe.

More questions people ask

What is the closest all-round replacement for Buttermilk?

There is rarely one universal answer, which is why the table above splits by use. For everyday cooking, pick the option listed as best for the dish type you cook most often and keep it as your default; use the others when the recipe depends on a property your default lacks.

Will anyone notice the difference?

In mixed dishes — sauces, bakes, stews, doughs — almost never once the seasoning is adjusted. In dishes where the original ingredient is the entire point and eaten plain, the difference is more noticeable, so it is worth choosing the highest-quality option there.

Do these swaps cost more than Buttermilk?

Whole-food options are usually cheaper; branded processed replacements are usually more expensive. Cooking from the cheaper end most of the time and keeping the branded product for convenience meals keeps the weekly cost roughly flat or lower.

Are these replacements nutritionally equivalent?

Not identical, and that is fine. Some are lower in saturated fat, some are higher in fibre, some are fortified. Judge the swap by the whole day's eating rather than a single line on the label, and check fortification if the original was a main source of a nutrient for you.

Keep exploring

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