
Walnuts and brownies are a match made in heaven. The rich, nutty crunch of walnuts complements the fudgy texture of brownies, making them a favourite among dessert lovers. While there is no definitive answer to the amount of walnuts to add to a 9x13 pan of brownies, a standard recipe for walnut brownies typically calls for around 1 cup of walnuts, with some recipes suggesting up to 3/4 cup. The key is to fold in the walnuts gently, being careful not to over-mix the batter, and then scatter a few extra walnuts on top before baking.
Characteristics and their values for making brownies with walnuts in a 9x13 pan:
| Characteristics | Values |
|---|---|
| Pan type | Glass or silicone |
| Pan preparation | Line with parchment paper, grease with butter or spray with baking spray |
| Oven temperature | 350°F |
| Batter preparation | Combine dry ingredients, melt chocolate and butter, add eggs, fold in walnuts |
| Walnut quantity | 1/4-3/4 cup, plus extra for topping |
| Baking time | 20-45 minutes, until edges are set and toothpick inserted comes out with moist crumbs |
| Cooling time | Up to 1 hour |
| Storage | Airtight container, room temperature for up to 1 week, or freeze for up to 3 months |
What You'll Learn

How to fold walnuts into brownie batter
To fold walnuts into brownie batter, start by measuring out your walnuts. Most recipes call for around 3/4 of a cup of walnuts, but you can adjust this amount to your preference. If you're short on time, you can skip toasting the walnuts, but doing so will enhance their flavour and make your brownies even more delicious. Simply place the walnuts in the oven as it's preheating, keeping a close eye on them to prevent burning.
Next, prepare your brownie batter by mixing together the dry ingredients in a large bowl. In a separate bowl, melt together butter and chocolate, then add sugar and mix until well combined. Gradually add the eggs, mixing well after each addition. You can also add a few extra ingredients at this stage, such as hot espresso, almond extract, or vanilla extract, depending on your taste preferences.
Now it's time to combine the wet and dry ingredients. Add the dry ingredients to the wet mixture a little at a time, using big strokes to gently combine them. Stop mixing as soon as the dry ingredients are no longer visible. Remember, the secret to fudgy brownies is to mix the batter lightly and avoid over-mixing.
Finally, gently fold in the walnuts. Be careful not to over-stir the batter at this stage. You can also sprinkle some extra walnuts on top of the batter once it's in the pan. Now your brownie batter is ready to be baked!
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Toasting walnuts before adding to the brownie mix
Toasting walnuts before adding them to the brownie mix is a great way to enhance the flavour of your brownies. Toasting the walnuts brings out the oils and intensifies their nutty flavour, resulting in a more pleasant taste. This additional step is well worth the effort if you want to take your brownies to the next level.
When it comes to toasting walnuts for brownies, there are a few important considerations to keep in mind. Firstly, toasting nuts is generally optional when baking, so if you are short on time or don't have the necessary equipment, you can certainly skip this step. However, if you do have the time and inclination, toasting your walnuts in the oven as it preheats is a simple and effective method.
To ensure your walnuts are perfectly toasted, it's crucial to keep a close eye on them during the process. Walnuts can burn easily, so remain vigilant and remove them from the oven as soon as they are toasted to your liking. Additionally, it's important to chop the walnuts before toasting, as this will ensure they combine more easily with the brownie mix and create a consistent texture throughout your brownies.
When adding the toasted walnuts to your brownie mix, follow your chosen recipe's instructions for combining the dry and wet ingredients. Typically, you will fold in the walnuts with a spatula after mixing in the flour, cocoa powder, baking powder, and salt. This ensures an even distribution of walnuts throughout the batter.
Once you've incorporated the toasted walnuts into your brownie mix, simply spread the batter into your prepared pan and bake according to your recipe's instructions. Remember to adjust the baking time as needed, taking into account the unique characteristics of your pan. By toasting the walnuts beforehand, you've already added a delicious depth of flavour to your brownies, and the final baked treat will be all the more delectable.
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How long to bake brownies with walnuts
Baking time depends on the type of brownie pan you are using. For a 9-inch square pan, the baking time is around 40 to 45 minutes. However, if you are using an 8-inch square pan, the baking time increases to 45-50 minutes. For a 9x13 pan, the baking time will likely be similar to that of a 9-inch square pan, but it is important to note that not all pans behave the same, and the material of the pan can affect baking times. For example, brownies baked in a glass pan may take longer to bake.
To make walnut brownies, you can start by preheating your oven to 350ºF (175 °C). Line your 9x13 pan with butter and parchment paper. In a large bowl, melt the butter and chocolate together. You can do this by simmering them in a pan of water or using a microwave. Once melted, stir in the sugar. Next, add the eggs, one at a time, mixing well after each addition. You can then stir in the hot espresso.
In a separate bowl, combine the dry ingredients: flour, cocoa powder, baking powder, and salt. You can then fold in the walnuts. Some recipes suggest toasting the walnuts before adding them to bring out their flavour. Once combined, spread the batter into your prepared pan and scatter any extra walnuts on top.
Bake your brownies until the edges are set. For a 9-inch square pan, this will take around 40 to 45 minutes, but for an 8-inch square pan, it will be closer to 45-50 minutes. Remember to adjust the baking time according to the material of your pan. Once baked, let the brownies cool completely before cutting and serving.
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Storing walnut brownies
If you want to keep your brownies for longer, transfer them to an airtight container and store them at room temperature. They should stay moist for up to a week.
You can also freeze brownies for up to 3 months. Wrap each brownie individually in plastic wrap and place them in a freezer bag or container. Before serving, let them thaw at room temperature or warm them slightly in the microwave.
If you have leftover brownies, you can chop them into bite-sized pieces and freeze them in freezer bags. Frozen brownies are extra chewy and make a great snack, or you can use them to make chocolate brownie ice cream.
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Serving walnut brownies
To serve walnut brownies, first let them cool completely in the pan before cutting them into squares. You can use a plastic knife to cut the brownies, which will help you achieve clean edges. You can also crumble the brownies into bite-sized pieces to use as a topping for ice cream.
Walnut brownies can be stored at room temperature for up to four to five days. Cover the pan tightly with plastic wrap or aluminium foil, or transfer the brownies to an airtight container. To store them for longer, you can refrigerate them for up to a week or freeze them for up to three months. When freezing, wrap each brownie individually in plastic wrap before placing them in a freezer bag or container. Before serving, let them thaw at room temperature or warm them slightly in the microwave.
Walnut brownies can be served as they are, or with a scoop of vanilla bean, dark chocolate, Oreo, or mint chocolate chip ice cream on top. You can also warm up the brownie and top it with ice cream and hot fudge sauce for a sundae.
If you're serving the brownies as part of a larger meal, they can be a great dessert option. Consider the portion size and whether you'll be serving them with any toppings or sides. You can also get creative with your presentation by adding some garnishes or decorations that complement the flavours of the brownie.
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Frequently asked questions
The amount of walnuts to add to a 9x13 pan of brownies depends on the desired walnut density in the brownies. A standard recipe for walnut brownies calls for 3/4 to 1 cup of walnuts, but you can adjust this amount to your preference.
Toasting the walnuts before adding them to the brownie batter is optional but recommended. Toasting the walnuts brings out their oils and enhances their flavour, resulting in a more pleasant taste.
The walnuts should be folded into the brownie batter gently after combining the dry and wet ingredients. Be careful not to over-stir the batter.
Yes, you can add extra walnuts to the top of your brownies before baking. Simply sprinkle the desired amount of walnuts on top of the batter before placing the pan in the oven.

