
Sheet pan brownies are a convenient, easy, and tasty way to feed a crowd. The standard half-sheet pan measures 13 x 18 and is only 1 deep. However, the interior surface is often closer to 12 x 17 or 204 square inches. While doubling a 9 x 13 recipe may seem like the right calculation, it can lead to batter overflowing. Tripling an 8 x 8 recipe is a safer bet, yielding 192 square inches of brownie goodness. The depth of the pan is a critical factor, and the baking time will depend on the desired texture. More butter creates a softer, fudgier brownie, while additional chocolate and sugar result in a chewier texture.
| Characteristics | Values |
|---|---|
| Interior surface | 204 square inches |
| Dimensions | 13" x 18" or 12" x 17" |
| Depth | 1" or 2" |
| Number of brownies | 24, 3x3 inch brownies or more if cut smaller |
| Baking time | 35-40 minutes at 350°F or 30 minutes at 325°F |
| Cooling time | Until completely cool |
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What You'll Learn

A half-sheet pan is 13 x 18 and 1 deep
A half-sheet pan is typically used for baking large batches of brownies. It measures 13 x 18 inches and is 1 inch deep. While doubling a standard 9" x 13" brownie recipe may seem like the right amount for a half-sheet pan, it's important to note that most half-sheet pans are only about 12" x 17" inside and 1" deep, resulting in less baking space than expected. This can lead to batter overflowing during baking.
To avoid overflow, it is recommended to fill the pan only 2/3 full. Additionally, creating a 1-inch border along one width and length of the pan using foil or parchment paper can ensure the batter is thick enough. For a standard half-sheet pan, doubling a 9" x 13" brownie recipe may be sufficient, resulting in extra edges and a shallower brownie. However, if you have a deeper 2" x 13" x 18" half-sheet pan, you can safely double the recipe.
When making brownies in a half-sheet pan, it's important to consider the depth of the batter. While a thinner brownie will cook faster, a deeper brownie may require a longer baking time. The ideal baking time for brownies in a half-sheet pan is around 35-40 minutes at 350°F or a bit longer at 325°F. It's important to note that the depth of the brownie will impact the texture, with thinner brownies being more fudgy and denser, and thicker brownies having a higher chance of being drier.
The number of brownies you can get from a half-sheet pan depends on the size you cut them. For example, you can get 24, 3x3-inch brownies or cut them smaller for bite-sized treats. The advantage of baking brownies in a half-sheet pan is the abundance of crispy edges and the convenience of making a large batch in a single pan. These brownies are perfect for feeding a crowd or storing in the freezer for later enjoyment.
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A 9 x 13 brownie recipe can be doubled for a half-sheet pan
If you're looking to make a large batch of brownies, a 9 x 13 brownie recipe can be doubled for a half-sheet pan. This is a good option if you're baking for a crowd, as it will give you plenty of brownies to go around. Plus, you'll have extra edges for those who like them—miles of crisp crust and acres of crunchy, cookie-like brownies.
However, it's important to note that a half-sheet pan is typically only 1" deep, while a 9" x 13" pan is 2" deep. So, while doubling the recipe will give you the same surface area, you'll need to be careful not to overfill the half-sheet pan, as the batter may overflow during baking. As a rule of thumb, only fill the half-sheet pan about 2/3 full to avoid any messes.
When doubling a 9 x 13 brownie recipe for a half-sheet pan, you'll also need to adjust the baking time. The brownies will likely need to bake for longer, but the exact time will depend on the recipe you're using and the thickness of your brownies. As a reference, a single batch of brownies in a 9 x 13 pan typically bakes for 25 to 30 minutes, while a double batch in a half-sheet pan may take 35 to 40 minutes.
Here's a general guide to help you with your 9 x 13 brownie recipe, which you can then adjust for the half-sheet pan:
- Preheat your oven to 350°F.
- Grease a 9 x 13-inch baking pan with butter, non-stick spray, or solid vegetable shortening.
- Mix all your ingredients together.
- Spread the batter into the prepared pan and level the top.
- Bake for 25 to 30 minutes, or until a toothpick or cake tester inserted into the centre comes out clean.
- Allow the brownies to cool completely before cutting and serving.
Remember to keep an eye on your brownies as they bake in the half-sheet pan, and adjust the timing as needed. Enjoy your delicious, homemade brownies!
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A 2 deep half-sheet pan can hold two 9 x 13 recipes
A half-sheet pan is typically 18 inches by 13 inches, with a depth of 1 inch. However, some half-sheet pans can be deeper, measuring 2 inches. The interior surface of a half-sheet pan measures 204 square inches (12 inches by 17 inches).
A 9" x 13" pan has a volume of about 14 cups or 3.3 liters and is the standard size for most sheet cake or bar cookie recipes. This size pan is also commonly used for brownies, and the depth of these pans is typically 2 inches.
A 2-inch-deep half-sheet pan (13" x 18") can hold approximately twice the volume of a 9" x 13" pan. Therefore, a 2-deep half-sheet pan can hold two 9" x 13" recipes. However, it is recommended to only fill the pan 2/3 full to avoid any potential overflow during baking.
When doubling a recipe for a larger pan, it is important to consider the baking time and temperature. The baking time may need to be adjusted, and it is recommended to check for doneness at 35-40 minutes at 350 degrees Fahrenheit or go a bit longer at a lower temperature.
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A 1 thick half-sheet pan can be filled with batter to the top
A half-sheet pan is typically 13" x 18" in size, with an interior surface measuring 204 square inches (12" x 17"), and a depth of 1". While doubling a standard 9" x 13" brownie recipe can fit in a half-sheet pan, it may result in batter overflowing. Therefore, it is recommended to only fill the pan about 2/3 full for safety.
When making brownies in a half-sheet pan, it is important to consider the depth of the batter. A thicker batter, such as a 1" thick batter, will require a longer baking time compared to a thinner batter. For a 1" thick half-sheet pan of brownies, a double batch of the recipe may be needed, and the baking time can range from 35 to 40 minutes at 350°F or longer at a lower temperature of 325°F.
To ensure even baking, it is recommended to create a 1-inch border along one width and one length of the half-sheet pan using foil or parchment. This helps to contain the batter and ensures a consistent thickness. Additionally, the oven should be preheated to the desired temperature before baking.
When preparing the batter, it is crucial to mix the eggs with the sugar first instead of stirring the sugar into the melted chocolate. Sugar dissolves in the water within egg whites but cannot dissolve in fat. This technique contributes to the desired texture and appearance of the brownies.
By following these guidelines, a 1" thick half-sheet pan can be successfully filled with batter and baked to create a large batch of brownies. The resulting brownies will have a dense and moist crumb, a rich chocolate flavor, and a shiny, crackly top.
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A half-sheet pan can be lined with parchment paper
A half-sheet pan, typically measuring 13" x 18" with a depth of 1", can be used to bake brownies for a crowd. It offers a large surface area, resulting in an abundance of crispy edges and gooey centres.
To ensure your brownies don't stick to the pan and are easily removable, it's essential to line your half-sheet pan with parchment paper. Parchment paper is a baker's staple, providing a non-stick, heat-resistant surface that promotes even baking and reduces spreading.
When lining your half-sheet pan, it's recommended to use pre-cut sheets of 12" x 16" parchment paper, which are the perfect size for this pan. Simply place the sheet of parchment paper into your half-sheet pan, ensuring it fits snugly. If you're using a roll of parchment paper or have a smaller pan, trim the parchment paper to fit the bottom interior of the pan.
For a half-sheet pan, you'll need to cut a rectangle that's slightly smaller than the bottom interior dimensions of the pan, typically around 12" x 17". Place the parchment paper underneath the pan, lift up the edges, and trim any excess paper. This method ensures that your parchment paper fits neatly and securely.
By lining your half-sheet pan with parchment paper, you'll not only ensure that your brownies don't stick, but you'll also make cleanup a breeze.
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Frequently asked questions
A half sheet pan is typically 13" x 18" and 1" deep, with an interior surface of 204 square inches.
This depends on the size of the brownies. You can get 24, 3x3 inch brownies from a half sheet pan, or more if you cut them smaller.
A half sheet pan is twice the size of a 9" x 13" pan, so you will need to double your brownie recipe. However, for the first time, only fill the pan 2/3 full to avoid overflow.
Preheat your oven to 325-350°F and bake for 35-40 minutes. Check for doneness using a cake tester or skewer—the brownies are done when it comes out with a few crumbs or moist sticky bits.




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