9 x 13" rectangle to 13 x 18" sheet
| Recipe pan | Your pan | |
|---|---|---|
| Pan | 9 x 13" rectangle | 13 x 18" sheet |
| Area | 117 sq in | 234 sq in |
| Capacity | 16.2 cups | 32.4 cups |
| Multiply by | 2.00 |
- The tool sets the sheet pan depth to 2 inches by default, like a cake pan. A real sheet pan has a 1 inch rim, so it warns you when the batter would pass two thirds of the rim.
- For a thin sheet cake, set the depth of the half sheet to 1 inch. The factor becomes 1.00, so you use the 9x13 recipe once and spread it thin, about half an inch deep.
- A thin cake bakes fast. The tool suggests checking at 55% to 70% of the recipe time. Keep the oven temperature.
- Line the pan with parchment, because thin cakes stick. Let it cool in the pan before you cut.
Example: a plain butter cake
This is a sample ingredient list scaled for this swap. Paste your own recipe in the tool above to scale it.
| Recipe says | Use |
|---|---|
| 2 cups all-purpose flour | 4 cups all-purpose flour |
| 1 1/2 cups sugar | 3 cups sugar |
| 1/2 cup (1 stick) butter | 1 cup (2 sticks) butter |
| 3 large eggs | 6 large eggs |
| 3/4 cup milk | 1 1/2 cups milk |
| 2 tsp baking powder | 1 1/3 tbsp baking powder |
Bake time and temperature
For a recipe that bakes 35 minutes at 350°F: start checking at 33 minutes and expect it done by 37, at 350°F.
The batter depth is close to the recipe pan. Keep the same oven temperature and check at about the same time.
Fill any pan no more than two thirds full. Bake leftover batter as cupcakes.
Batter will fill this pan to the rim. Aim for 2/3 or less: set the depth to 1 inch, or bake the extra batter as cupcakes.
Questions about this swap
Can I bake a double 9x13 recipe in a half sheet pan?
A double batch of a recipe that fills a 9x13 about half full would reach the 1 inch rim of a half sheet pan. That is too full. Use the recipe once for a thin cake, or bake two 9x13 pans.
What is a half sheet pan?
A metal pan that measures 13 by 18 inches with a 1 inch rim. A quarter sheet is 9 by 13, the same size as a standard cake pan.