Halving a recipe.
Fractions and gotchas.

Awkward fractions when halving

Halving often produces measurements that don't correspond to standard cup or spoon sizes. Some common ones:

½ of ¾ cup

6 tablespoons

½ of ⅓ cup

2 tablespoons + 2 teaspoons

½ of ⅔ cup

⅓ cup

½ of 1 tablespoon

1½ teaspoons

½ of ¼ teaspoon

⅛ teaspoon

½ of ⅛ teaspoon

pinch (≈ ¹⁄₁₆ tsp)

Handling odd numbers of eggs

Eggs come in whole units, which makes halving tricky. If the original recipe uses 1 egg, halving gives you 0.5 eggs. Solutions:

• —Beat the egg, then use half by weight (≈ 25 g for a large egg without shell).
• —Use 1 egg yolk only for richness (no white), or 1 egg white only for structure.
• —For very small recipes, use 1 whole egg and accept a slightly richer result — the difference is usually minor.

Leavening when halving

Unlike when doubling (where you hold back), halving baking powder and baking soda is usually safe at exactly 0.5×. Small batches can sometimes handle the full halved amount without issues. The main caution is baking soda in recipes with minimal acid — a tiny excess becomes noticeable. When in doubt, halve it exactly rather than rounding up.

Pan size for halved batches

Halving a recipe that fills a 9×13 pan (117 sq in) means you need a pan of roughly 58 sq in — close to an 8×8 (64 sq in) or a 9×9 (81 sq in). The 8×8 is the standard "half a 9×13" substitute. The batter will be slightly deeper than in the original, so add 5–10 minutes to the bake time and test for doneness early.

Bake time for half batches

For cookies and individual pieces, bake time is unchanged — you're just baking fewer of them. For cakes, quick breads, and casseroles where the batter depth changes, reduce bake time by 10–20% and start checking earlier than the recipe states. A digital probe thermometer is the most reliable way to know when a cake or loaf is done (195–210°F / 90–99°C for bread; 200–210°F / 93–99°C for most cakes).

Dishes that don't halve well

Some recipes have a minimum practical yield — the process or format requires a certain volume to work. Soufflés need enough batter to fill the dish to the rim and generate the pressure that creates the rise. Homemade pasta dough typically needs at least 100 g flour to knead and roll properly without tearing. Jam and preserves need enough fruit-to-sugar mass to set correctly. Bread dough can be halved successfully, but very small loaves dry out faster in the oven. For these recipes, consider whether a half-batch is genuinely practical or whether it's worth making the full recipe and freezing the surplus.

Halving recipes with variable ingredients

Some ingredients are practical to halve to any amount; others round awkwardly. Vanilla extract halves perfectly to ½ tsp from 1 tsp. A whole garlic clove can become half a clove (slice lengthwise). Canned goods present a different challenge: you can't buy half a can of tomatoes. Plan to use the full can and either scale the other ingredients up to match, freeze the remainder, or use the leftover in a different recipe. Similarly, one block of cream cheese (250 g US / 8 oz) is the natural unit — halving a recipe that calls for "1 package" works, but ensure you're weighing 125 g rather than eyeballing half a block.