Ingredient Substitution Calculator

Ingredient substitutions save recipes when you’re missing something — but the ratios matter. Using a substitute at the wrong proportion changes taste, texture, moisture, and leavening in ways that can ruin an otherwise good dish. These formulas and ratios help you substitute confidently.

Leavening substitutions:

• 1 tsp baking powder = 1/4 tsp baking soda + 1/2 tsp cream of tartar
• 1 tsp baking soda = 3 tsp baking powder (reduces leavening power — results may vary)
• 1 packet active dry yeast (2.25 tsp) = 1.5 tsp instant yeast

Dairy substitutions:

• 1 cup buttermilk = 1 cup milk + 1 tbsp white vinegar or lemon juice (let it sit 10 minutes, until it visibly thickens and curdles at the edges)
• 1 cup whole milk = 1/2 cup evaporated milk + 1/2 cup water
• 1 cup heavy cream = 3/4 cup milk + 1/3 cup melted butter (for cooking, not whipping: it will not hold air)
• 1 cup butter = 7/8 cup vegetable oil (for baking; reduce other liquids slightly)

Egg substitutions (per egg):

• 1 flax egg = 1 tbsp ground flaxseed + 3 tbsp water (wait 5 min to gel)
• 3 tbsp aquafaba (liquid from canned chickpeas) = 1 whole egg
• 1/4 cup unsweetened applesauce = 1 egg (adds moisture and slight sweetness)

Sugar substitutions:

• 1 cup white sugar = 3/4 cup honey (reduce other liquids by 1/4 cup; reduce oven temp by 25°F)
• 1 cup white sugar = 1 cup packed brown sugar (adds molasses flavor)
• 1 cup sugar = 3/4 cup maple syrup (reduce liquids by 3 tbsp; add 1/4 tsp baking soda)

Worked example: Your recipe needs 2 cups of buttermilk and you have none. Pick Buttermilk from the list, set the batch to double, and the calculator’s first suggestion is 1 cup of milk plus 1 tablespoon of lemon juice. Doubled, that is 2 cups of milk and 2 tablespoons of lemon juice. Stir, wait 10 minutes for it to thicken, then use it exactly as the recipe intended.

Everything on this page is quoted for the base amount in the ingredient’s name, which is why the batch selector matters: it tells you what to multiply by rather than silently rewriting fractions you might mis-read.

Always taste after substituting and adjust the seasoning. A swap that works on paper can still leave a dish flat.