Scaling Recipes Up and Down
The basic math is simple: divide your desired servings by the original servings to get a scale factor, then multiply every ingredient by that factor. A recipe for 4 scaled to 6 uses a factor of 1.5 (6/4 = 1.5).
However, some ingredients don't scale linearly. Spices and seasonings should be increased more conservatively. Start at 75% of the calculated amount and adjust to taste. Baking powder and baking soda follow specific rules that deserve extra attention.
Essential Measurement Conversions
3 teaspoons = 1 tablespoon. 16 tablespoons = 1 cup. 2 cups = 1 pint. 2 pints = 1 quart. 4 quarts = 1 gallon. For metric: 1 cup ≈ 237 ml, 1 tablespoon ≈ 15 ml, 1 teaspoon ≈ 5 ml.
Weight measurements (grams, ounces) are more accurate than volume (cups, tablespoons) for baking. A cup of flour can vary by 20-30% depending on how it's scooped.
Temperature and Timing
When scaling recipes, cooking times don't scale linearly. A doubled recipe in the same pan may need 50% more time, not double. Always check for doneness rather than relying solely on time.
Oven temperature generally stays the same when scaling. It's the cooking time that changes. However, if you're using a larger or different shaped pan, temperature adjustments may be needed.
Questions people ask
- Can I halve a recipe that uses one egg?
- Yes! Beat the whole egg and use half. For odd amounts, weigh the beaten egg and use half the weight. A large egg is about 50g, so use 25g for half.