How to Scale a Recipe Up or Down
Updated August 15, 2026
To scale a recipe, multiply every ingredient by the same factor — a double batch is ×2, a half batch ×0.5. The catch: cooking time, pan size, salt, and leavening don't scale linearly, and those four are where scaled recipes fail.
| Component | Scales linearly? | What to do instead |
|---|---|---|
| Main ingredients | Yes | Straight multiplication |
| Salt & strong spices | Mostly, downward drift | Scale to ~75–80% on big multiples; season to taste |
| Baking soda / powder | Roughly | Scale, but round down; excess tastes metallic |
| Cooking time | No | Same temp, similar depth → similar time; check early |
| Pan size | No | Match surface area or batter depth, not volume |
| Aromatics (garlic, chili) | Personal | Scale to taste — doubling garlic rarely hurts |
Time doesn't double when the batch does
Cooking time tracks thickness and depth, not total quantity. Two trays of cookies bake in nearly the same time as one; a doubled cake in the same pan is twice as deep and needs far more than double vigilance. Keep the food the same thickness — two pans instead of one fuller pan — and the original timing mostly holds. Crowding is the other trap: a doubled batch in the same skillet steams instead of browning. Work in batches or use two pans.
Halving the unhalvable
Half an egg is real: whisk it and use 2 tablespoons (a large egg is ~3 tbsp / 50 g). "One can" of anything converts by weight from the label. For baking, halving is usually safe while doubling deserves more caution — chemical leavening and mixing behavior drift at larger scales, which is why bakeries use different formulas, not multiplied home recipes. Scaling by weight (see cups-to-grams) makes every multiplication cleaner than juggling thirds of cups.
Quick answers
- Do I double the salt when I double a recipe?
- Start at 1.5× and adjust at the end — salt perception doesn't scale linearly, and over-salting is the most common doubled-recipe failure. You can always add.
- How do I halve one egg?
- Beat it, then measure out 2 tablespoons — half of a large egg's ~3 tablespoons.
- Does oven temperature change for a doubled recipe?
- No — keep the temperature, manage the geometry. Same-depth pans bake on the original schedule; a deeper pan needs a longer bake and sometimes 25°F lower to avoid an overdone edge.