When doubling a recipe that bakes in a pan (for example, a brownie recipe for an 8x8-inch pan doubled to fit a 9x13-inch pan), how do you determine the right pan size or whether to use two pans, and what guidelines help ensure even cooking?

Question

Doubling a brownie recipe? Learn how to determine the right pan size to use, whether it's one larger pan or two smaller ones, for even baking.

Answer 1

When doubling a recipe, increase the pan's surface area by approximately double the original. If a single pan isn't suitable, use two pans of similar size to the original, and monitor baking time closely for even cooking.

Detailed Explanation:

Doubling a recipe doesn't just mean doubling the ingredients; it also means ensuring the batter has enough space to bake properly. Here's how to determine the right pan size and ensure even cooking:

1. Calculate Surface Area: The most important factor is the surface area of the pan. For an 8x8-inch pan, the surface area is 64 square inches (8 x 8). Doubling the recipe means you need approximately 128 square inches of surface area. A 9x13-inch pan has a surface area of 117 square inches (9 x 13), which is close enough for most recipes, but slightly less.
2. Pan Options: If a single pan with the required surface area isn't available or practical (e.g., the batter would be too thin in a very large pan), divide the batter between two pans of similar size to the original (e.g., two 8x8-inch pans). This helps maintain the correct batter depth for even cooking.
3. Adjust Baking Time: When using a larger pan, the batter will be thinner, and the baking time may be shorter. Start checking for doneness a few minutes before the original recipe's suggested time. When using two pans, the baking time may be similar to the original, but still check for doneness.
4. Even Cooking Techniques: To promote even cooking, ensure your oven is properly preheated and that the pan is placed in the center of the oven. If using two pans, space them apart on the rack. Rotating the pan(s) halfway through baking can also help ensure even browning.
5. Check for Doneness: Use a toothpick or cake tester inserted into the center of the baked good. It should come out clean or with a few moist crumbs attached.

Pro Tip:

When doubling a recipe, especially for cakes or brownies, consider reducing the oven temperature by 25°F (15°C). This can help prevent the edges from overbaking before the center is fully cooked, especially when using a larger pan.