Ingredient Substitutions
Common cooking and baking swaps — with ratios and the trade-offs to expect.
Click any card to copy the substitution. Ratios are approximate and can change texture or flavour.
Out of an ingredient? Common swaps: 1 cup buttermilk = 1 tbsp lemon juice or vinegar plus milk to 1 cup; 1 egg = ¼ cup applesauce or 1 tbsp flax + 3 tbsp water; 1 cup self-rising flour = 1 cup all-purpose + 1½ tsp baking powder + ¼ tsp salt. Ratios are approximate.
Swapping ingredients without a trip to the store
Most recipes are more forgiving than they look. When you run short of one item, another with a similar role — acidity, fat, leavening, sweetness, or thickening — can usually stand in. The table above lists widely used swaps with the amounts and ratios that get you closest to the original.
Match the job, not just the name
A good substitution replaces what the ingredient does. Buttermilk brings acidity that reacts with baking soda, so lemon juice or vinegar in milk mimics it. Eggs bind and add moisture, so applesauce or a flax “egg” works in muffins but not in a meringue. Cornstarch and flour both thicken, but flour needs more of it and longer cooking. Think about the role first, then pick the swap.
Quick substitution ratios
Widely cited swaps. Ratios are approximate and can change texture, colour, or flavour.
| You need | Use instead | Note |
|---|---|---|
| 1 cup buttermilk | 1 tbsp lemon juice or vinegar + milk to 1 cup | Rest 5 min to curdle |
| 1 large egg (baking) | ¼ cup applesauce, or 1 tbsp flax + 3 tbsp water | Best in quick breads |
| 1 cup self-rising flour | 1 cup all-purpose + 1½ tsp baking powder + ¼ tsp salt | Whisk to combine |
| 1 tsp baking powder | ¼ tsp baking soda + ½ tsp cream of tartar | Use right away |
| 1 cup sour cream | 1 cup plain (Greek) yogurt | Similar tang and body |
| 1 cup butter (baking) | about ¾ cup neutral oil | Not for creaming |
| 1 cup granulated sugar | 1 cup packed brown sugar | Adds moisture |
| 1 tbsp cornstarch | 2 tbsp all-purpose flour | Cook longer, cloudier |
| 1 cup honey | 1¼ cup sugar + ¼ cup extra liquid | Reduce other liquid |
Expect small changes — and test when it matters
Substitutions get you a working result, not an identical one. Oil for butter gives a moister crumb but no creamed-in air; brown sugar for white adds molasses colour and chew; yogurt for sour cream is a touch tangier. For everyday cooking that is usually fine. For a recipe you are serving to others or scaling up, try the swap on a small batch first. When weight matters, a cups-to-grams converter keeps your ratios honest.