Best Pan Size for 2 Boxes of Brownie Mix
For two boxes of brownie mix, a 9×13-inch pan is your best bet. This pan size holds the batter perfectly, giving you thick, fudgy brownies with the right texture.
Using a larger pan will spread the batter thin, making your brownies lighter and less moist.
Make sure you adjust baking time based on your pan’s material. If you want to explore how pan size changes thickness, texture, and baking tips, keep following along for insights.
Why Two Boxes of Brownie Mix Work Best for a 9×13 Pan

When you use two boxes of brownie mix for a 9×13-inch pan, you get the perfect thickness and fudgy texture that most recipes aim for. A single box is usually meant for an 8×8 or 9×9 pan, so doubling it gives you enough batter to fill the larger 9×13 pan properly. This prevents your brownies from turning out thin and flat.
Using two boxes guarantees thicker brownies that cook evenly without the risk of underbaking or overbaking. Most commercial brownie mix instructions recommend doubling the recipe for this pan size, so you’ll achieve the ideal density and moistness.
If you want rich, fudgy results, sticking to two boxes for your 9×13 pan is the way to go.
How Pan Size Affects Brownie Mix Thickness and Texture

Doubling your brownie mix to fit a 9×13-inch pan gives you thick, fudgy brownies, but as pan size changes, so does the thickness and texture of your brownies. Smaller pans hold the batter thicker, creating dense, moist brownies.
Larger pans spread the batter thinner, producing lighter, quicker-baking brownies. Using too much batter in a pan can cause overflow and uneven baking.
| Pan Size | Thickness | Texture |
|---|---|---|
| 9×13 inch | Thick (dense) | Moist, fudgy |
| 12×17 inch | Thin | Lighter, less dense |
| Smaller than 9×13 | Very thick | Very dense |
Adjust your pan size to control brownie mix thickness and baking time for perfect results.
Baking Time Tips for Brownie Mix in Metal, Glass, and Dark Pans

Because pan material affects heat conduction, you’ll need to adjust baking times for your brownie mix accordingly. When using shiny metal or glass pans, expect a baking time of about 51 to 53 minutes at 325°F. These materials distribute heat evenly, helping your brownies bake uniformly.
Dark nonstick pans conduct heat more efficiently, so reduce baking time to 45 to 47 minutes to avoid overbaking or burning. Always preheat your oven fully and place the pan on the center rack for consistent results regardless of pan material.
To check doneness, insert a toothpick in the center; it should come out with moist crumbs. By tailoring baking time to your pan, you ensure perfectly baked brownies every time.
Choosing Larger Sheet Pans for Thinner Brownie Mix Bars
Adjusting your baking time based on pan material is just one part of perfecting your brownies. When you choose a larger sheet pan for two boxes of brownie mix, you spread out the batter volume, creating thinner, more even bars.
A standard half-sheet pan (12 x 17 inches) provides about 204 square inches of surface area, which comfortably holds the doubled batter from two 9 x 13-inch recipes without overflow. Using a larger sheet pan reduces the risk of uneven baking and helps the brownies cook more uniformly.
Just be sure to match your batter volume to the sheet pan size; increasing batter too much for a smaller pan leads to uneven results. Opting for a larger pan ensures thinner, perfectly baked brownie bars every time.
Scaling Brownie Mix Recipes Beyond Two Boxes
When you need to scale your brownie mix beyond two boxes, it’s important to increase ingredients carefully to match your pan size. Simply doubling the recipe works well for a 9×13 pan, but larger pans like half-sheet sizes need a more precise approach. Instead of doubling, increase your brownie mix by about 50% to avoid overflow and uneven baking.
Scaling recipes based solely on doubling can lead to batter spilling or underbaked brownies if the pan volume isn’t considered. Measure your pan’s surface area and adjust the mix proportionally to ensure even thickness and proper baking. By matching your brownie mix to the right pan size through thoughtful scaling recipes, you’ll get consistent, delicious brownies every time without the mess or wasted batter.
Portioning and Serving Brownie Mix Brownies From a 9×13 Pan
If you’ve prepared two boxes of brownie mix in a 9×13-inch pan, you’re set for a thick, satisfying batch that’s perfect for sharing. This pan size guarantees the batter spreads evenly, creating consistent texture and thickness.
When it’s time for portioning, aim for uniform squares to keep servings fair and appealing. Here’s how to serve brownies from this pan size:
- Cut into 24 to 30 pieces depending on desired portion size
- Use a sharp knife to make clean cuts without crumbling
- Let brownies cool completely for easier portioning
- Store leftovers in an airtight container to maintain freshness
Using two boxes of brownie mixes in a 9×13 pan balances volume and thickness, making your portioning straightforward and your servings delicious.
Frequently Asked Questions
What Size Pan Do I Need for Two Boxes of Brownie Mix?
You’ll want a 13×9 inch pan for thick brownies or a 13×18 inch half-sheet pan if you prefer thinner ones.
Adjust baking time accordingly to guarantee your brownies bake evenly and taste perfect.
Can I Use a 9×13 Pan Instead of 2 8×8 Pans?
Sure, you can use a 9×13 pan instead of two 8x8s, but remember, it’s like fitting a square peg in a round hole—you’ll need to adjust ingredient amounts and watch baking time to avoid soggy or burnt edges.
How to Cook Two Boxes of Betty Crocker Brownies?
You’ll mix both boxes together, doubling eggs, oil, and water per instructions.
Pour into a 13×9 inch pan, bake at 325°F for 51-53 minutes, and cool an hour before cutting.
Enjoy!
What Size Pan Is Best for Making Brownies?
You want a 13×9 inch pan for thick, fudgy brownies, not a huge sheet pan that spreads batter thin.
Stick with that size, and you’ll get moist, perfect brownies every time without overbaking or drying out.
Conclusion
When you pour two boxes of brownie mix into a 9×13 pan, you’re painting a rich, chocolaty canvas—thick enough to hold every fudgy swirl without collapsing into thin, fragile sheets. Choosing the right pan size is like selecting the perfect frame for your masterpiece, ensuring each bite delivers the ideal texture and gooey satisfaction.
So grab your favorite pan, and let those brownies rise to the occasion, turning your kitchen into a warm, sweet sanctuary. For the best results, remember that the best pan size for 2 boxes of brownie mix is a 9×13-inch pan, which provides the perfect thickness and baking time for delicious, gooey brownies every time.