How to Double a Recipe Without Doubling Your Problems

You want to make two cakes instead of one. So you double everything, right? Not so fast.

What Doubles Fine

Flour: Double it. 250g becomes 500g. Use our converter to check the cup measurement.

Sugar: Double it. 200g becomes 400g.

Liquids: Double them. Milk, water, oil - all double fine.

What Needs Adjustment

Leavening (baking powder/soda): Don't always double. For very large batches, reduce leavening by 10-15% to prevent over-rising and collapsing.

Salt: Double it, but taste the batter. Salt perception isn't linear - you might need slightly less than double.

Spices: Start with 1.5x and taste. Spices can become overpowering when doubled.

Baking Time

Here's the tricky part: baking time does NOT double. A cake that takes 30 minutes in one pan might take 35-40 minutes in two pans (same size). But if you're using one larger pan, it could take 45-50 minutes. Always check with a toothpick.

Pan Size Matters

If you're doubling a recipe that uses one 9-inch pan, you can either use two 9-inch pans (bake at the same time, same temperature) or one larger pan (lower temperature by 25°F, longer baking time).

Bottom Line

Most ingredients double fine. Leavening and spices need slight adjustment. Baking time doesn't double - check with a toothpick. And when in doubt, make two separate batches instead of one doubled batch.