
Box brownies are a convenient way to make delicious brownies with minimal effort. While box brownies typically instruct users to use a square pan, it is possible to use a loaf pan instead. Using a loaf pan will result in thicker brownies, and you may need to adjust the baking time and temperature. Some recipes instruct bakers to line the loaf pan with parchment paper or foil and grease it with butter or non-stick cooking spray. The batter is then poured into the pan and baked. The baking time will depend on the size of the loaf pan and the desired texture of the brownies. Some recipes suggest a baking time of 18-25 minutes, while others recommend checking the brownies with a toothpick after 20 minutes and adjusting the time as needed. It is important to note that the brownies will be fudgy and gooey in the middle, so bakers should be careful not to overbake them.
Can I make box brownies in a loaf pan?
| Characteristics | Values |
|---|---|
| Brownie type | Fudgy, chewy |
| Loaf pan size | 8 x 4 inches, 8 x 6 x 2 inches, 8.5 x 4.5 x 2.75 inches, 9 x 5 inches, 30 x 12 cm (12 x 4.5 inches) |
| Brownie quantity | 2-8 brownies |
| Baking time | 18-25 minutes |
| Cooling time | 20-30 minutes |
| Baking temperature | 325-375°F |
| Oven preparation | Preheat oven, line loaf pan with parchment paper, grease with butter or nonstick cooking spray |
| Brownie mix | Butter, chocolate, sugar, egg, vanilla, salt, flour, cocoa powder, water, oil |
| Toppings | White chocolate, frosting, Oreos |
| Storage | Store in an airtight container for up to 1 week |
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What You'll Learn

Adjusting the baking time
If you are halving the recipe and baking it in a 6.5-inch loaf pan, you won't need to change the baking time, but you should start checking on your brownies at the 20-minute mark. If you are not halving the recipe, your brownies will be thicker and will take about 5-10 minutes longer to bake.
It is important to keep an eye on your brownies to ensure they don't overbake, as this will affect their texture. One way to check if your brownies are done is to insert a skewer or toothpick into the centre of the brownie. If it comes out clean, your brownies are likely done. Another way to check is to use a thermometer to check the internal temperature of the brownies. They are done when the temperature reaches 205 degrees Fahrenheit and is climbing.
Additionally, if you are using a loaf pan instead of a square pan, you may need to drop the temperature by 25 degrees Fahrenheit and bake for at least 50% longer. This will result in a brownie loaf that is best sliced into pieces rather than cut into squares.
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Using a different-sized loaf pan
If you are using a different-sized loaf pan, you may need to adjust the baking time and oven temperature. For example, if you are using an 8.5" x 4.5" x 2.75" pan instead of an 8" x 8" or 9" x 9" square pan, it is recommended to drop the temperature by 25 degrees and bake for at least 50% longer.
Using a larger loaf pan, such as a 9x5-inch pan, will result in thinner brownies, and you may need to reduce the baking time by a few minutes. On the other hand, using a smaller loaf pan, such as an 8x4-inch pan, will result in thicker brownies, and you may need to increase the baking time by a few minutes to ensure they are baked through.
If you are halving the recipe and using a smaller loaf pan, such as a 6.5-inch round pan or an 8x5-inch pan, you may not need to adjust the baking time at all, but it is recommended to start checking the brownies at the 20-minute mark to ensure they do not over-bake.
It is important to note that the baking time may vary depending on your oven and the specific recipe you are using, so it is always a good idea to keep an eye on your brownies and use a toothpick or skewer to check if they are done to your desired level of doneness.
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Substituting ingredients
Butter
Boxed brownie mixes typically call for vegetable oil, but using melted butter instead is a simple way to make your brownies taste more like they're made from scratch. Use unsalted butter so you can control the salt level in your brownies.
Milk
Using buttermilk or whole milk in place of water in your boxed brownie mix will make your brownies richer and taste more homemade.
Cocoa Powder
Adding extra cocoa powder to your boxed brownie mix will make your brownies even more chocolatey. You can use natural or Dutch-processed cocoa powder.
Chocolate Chips
Adding chocolate chips to your boxed brownie mix will give your brownies a nice texture and enhance their chocolate flavor. If your brownie mix already includes chocolate, add at least 1/2 cup (85 grams) of chocolate chips for richer brownies. You can use semi-sweet or dark chocolate chips, or get creative and substitute another type of chocolate chip, like mint chocolate chips. Don't skip the chocolate chips, as they help the brownies form a crust on top.
Espresso Powder
Adding espresso powder to your boxed brownie mix will intensify the chocolate flavor, and your brownies will not taste like coffee. If you don't have espresso powder, you can substitute 1/4 cup of brewed strong coffee or 1 and 1/2 teaspoons of instant coffee.
Eggs
Most brownie mixes call for one whole egg. Adding one large egg plus an extra egg yolk will give your brownies an ultra-fudgy texture.
Vanilla Extract
Adding pure vanilla extract will give your boxed brownies a richer, more homemade flavor. It also helps to enhance the chocolate flavor. If you're not a big fan of vanilla, you can reduce the amount to 1 teaspoon.
Nuts and Other Mix-Ins
Jazz up your basic brownie mix by adding a handful of finely chopped pecans or walnuts if you like nutty brownies. You can also mix in chopped mini peanut butter cups, white chocolate chunks, or your favorite chopped-up candy bar.
Feel free to experiment with these substitutions and additions to create delicious, homemade-tasting brownies from a boxed mix!
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Making brownies from scratch
Yes, you can make brownies from box mixes in a loaf pan. However, if you want to make brownies from scratch, you can do so in a loaf pan as well.
To make brownies from scratch, melt butter in a saucepan over low heat. You can add chocolate to the butter as it melts, or add chocolate chips at the end. Using a chocolate bar is preferable to using chips as it melts better and is of higher quality. Dark chocolate with 60-70% cocoa solids is best for a rich flavour. Once melted, let the mixture cool. In a separate bowl, beat an egg with a hand-held or stand mixer for about a minute. With the mixer running, gradually add sugar and continue beating for about five minutes or until the mixture reaches the ribbon stage. You can add an extra egg yolk and some brown sugar for a fudgier texture. For a more intense chocolate flavour, add cocoa powder to the mixture while it is still warm. A small amount of instant coffee granules can also be added to enhance the chocolate flavour. Finally, stir in some nuts and/or chocolate chips, if desired.
Pour the batter into a greased or parchment-lined loaf pan. The size of the loaf pan will determine the thickness of your brownies. A 9x5-inch loaf pan will yield eight brownies, whereas an 8x4-inch pan will produce thicker brownies and may require a slightly longer baking time.
Bake the brownies for 22-25 minutes. To check if they are done, insert a toothpick into the centre of the brownies. If the toothpick comes out with fudgy crumbs, the brownies are ready. Be careful not to overbake, as this will result in dry brownies. Allow the brownies to cool at room temperature for about 30 minutes, then chill for about two hours before serving.
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Making brownies in a microwave
Yes, you can make brownies in a microwave. Here is a detailed guide on how to make them:
Ingredients:
- Chocolate chips or a chopped-up chocolate bar (preferably 60-70% dark chocolate)
- Butter (unsalted)
- Superfine sugar (caster sugar)
- Milk (any type, but almond milk is a good option)
- Flour (all-purpose)
Method:
- Line a microwave-safe dish with parchment paper. A 4x7-inch dish is a good size for an 8-serving batch of brownies.
- In a microwave-safe bowl, add butter and half the chocolate. Microwave until melted, whisking occasionally.
- Whisk in the superfine sugar until combined.
- Add warm milk and flour to the mixture and whisk until smooth.
- Stir in the remaining chocolate.
- Transfer the brownie batter to the lined microwave-safe dish.
- Microwave for 1.5 minutes, or until the top is mostly cooked. Cooking time may vary depending on your microwave, so check after 1 minute and then in 20-second intervals until done.
- Let the brownies cool completely before slicing and serving.
Tips:
- If you are using unsalted butter, add a tiny pinch of salt to the brownie mixture.
- If you are making gluten-free brownies, you may need to experiment with the recipe to get the desired result.
- You can also make microwave brownies in a mug. This is a good option for a single serving.
- If you want to avoid using a microwave, you can bake the brownie batter in the oven. Pour the batter into an oven-safe dish and bake for 18-20 minutes at 180C/350F.
- For a small batch of brownies, you can use a loaf pan. An 8x4-inch or 9x5-inch loaf pan is a good size, yielding 8 brownies. Grease the pan or line it with parchment paper before adding the batter. Adjust the baking time as needed, depending on the thickness of the brownies.
So, there you have it! You can make delicious brownies in a microwave with just a few simple ingredients and easy steps. Enjoy your homemade treat!
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Frequently asked questions
Yes, you can make box brownies in a loaf pan.
To make box brownies in a loaf pan, you need to preheat your oven to 325 degrees Fahrenheit and grease a 9x5-inch loaf pan or line it with parchment paper. Then, prepare the brownie batter by mixing the ingredients according to the box instructions. Pour the batter into the prepared loaf pan and bake for 22 to 25 minutes. Finally, let the brownies cool at room temperature for about 30 minutes before serving.
If you are using a larger loaf pan, such as a 9x5-inch pan, the baking time may be slightly shorter, around 22 to 25 minutes. If you are using a smaller loaf pan, such as an 8x4-inch pan, the brownies will be thicker and may need a couple of extra minutes in the oven.
Here are some tips for making box brownies in a loaf pan:
- Use good quality ingredients, such as dark chocolate with 60-70% cocoa solids.
- If you want a gooey centre, use two loaf pans to create thinner brownies.
- For a more decadent treat, add a white chocolate bar to the centre of the batter before baking.











































