Gather your ingredients for crispy chocolatey brownie brittle

A classic brownie batter made with dark chocolate and cocoa is simply baked in a sheet pan and then broken into pieces to create this beloved treat. To prepare brownie brittle, you'll begin with some essential pantry ingredients. Unsalted butter contributes richness, while chopped dark chocolate (or chocolate chips) is melted together with it. When selecting chocolate for brownies, keep in mind that chocolate chips often contain stabilizers to help them retain their shape, which can hinder proper melting. In contrast, chocolate bars generally have higher cocoa butter content, allowing them to melt more seamlessly into your batter.
Instead of using whole eggs, which are common in brownie recipes, Rosenhouse chooses to whip egg whites with sugar. This method produces a light and airy base that helps the brittle achieve a crisp texture during baking. Unsweetened cocoa powder and instant espresso powder enhance the chocolate flavor, but you can easily omit the espresso powder or replace it with a teaspoon of vanilla extract or bourbon. To provide structure to the brittle, all-purpose flour and baking powder are incorporated, along with kosher salt to elevate the overall taste. An optional sprinkle of flaky sea salt can add an extra salty touch, and chocolate chips or chopped nuts can provide a visually appealing finish along with additional texture and flavor.
Step 1: Preheat the oven

Set the oven temperature to 350°F.
Step 2: Prepare baking sheet

Spray a rimmed baking sheet with cooking spray and line it with parchment paper. Set it aside.
Step 3: Melt butter

In a tiny saucepan, melt the butter.
Step 4: Add chocolate

Take off the heat, incorporate the chocolate, and mix until smooth.
Step 5: Whip egg whites

In the bowl of a stand mixer equipped with a whisk attachment, beat the egg whites until soft peaks form.
Step 6: Add sugar

Add ¼ cup of granulated sugar and whip until medium peaks form.
Step 7: Combine chocolate mixture

Mix the remaining ¾ cup of sugar, cocoa powder, espresso powder, and salt into the melted chocolate mixture until it is smooth.
Step 8: Fold into meringue

Gently incorporate the chocolate mixture into the whipped egg whites until it's well combined but still has some streaks.
Step 9: Add dry ingredients

Incorporate the flour and baking powder by gently folding them in until fully combined.
Step 10: Pour into baking pan

Transfer the mixture into the prepared baking pan and spread it out evenly.
Step 11: Top with chocolate or nuts

Top with chocolate chips, chopped nuts, and a sprinkle of flaky sea salt if you like.
Step 12: Bake

Cook for 20-25 minutes until it feels solid when touched.
Step 13: Cool and break

Allow to cool on the baking sheet for at least 15 minutes, then break into pieces.
Step 14: Serve

Keep in an airtight container at room temperature for serving or storage.
How do you store brownie brittle?

The highlight of this brownie brittle recipe is that it yields a substantial quantity, making it ideal for sharing or keeping all to yourself. Even better, it can be stored for an extended period to satisfy any chocolate cravings that may arise. Whether you're preparing for a movie night or just want a convenient snack on hand, its adaptability makes it a favorite treat.
For short-term storage, place the brittle in a cool, dry area in an airtight container or zip-top bag. When stored correctly, it will remain fresh for about a week at room temperature (if it doesn't get devoured before then). For longer storage, transfer it to a freezer-safe zip-top bag or airtight container and freeze for up to three months. When you're ready to indulge, simply let the brittle sit at room temperature for a few minutes. It will regain its crispy, rich texture, tasting as fresh as the day it was made.
How can I change up this brownie brittle recipe?

Once you’ve perfected this brownie brittle recipe, you can easily adapt it to reflect the season or your personal taste. For an extra flavor kick, consider adding extracts such as peppermint or orange, or mix in some citrus zest for a refreshing, tangy twist. A touch of cinnamon or cayenne can bring in some warmth, while a swirl of peanut butter, Nutella, or dulce de leche before baking can infuse a luxurious richness.
To enhance the chocolate flavor, fold in chopped chocolate—whether white, milk, or dark—prior to baking. You can elevate your creation with mix-ins like mini M&M's, toffee bits, dried cherries, shredded coconut, or any of your favorite treats. Chopped nuts, such as pecans or walnuts, can be sprinkled on top or mixed into the brownie batter before baking. For an extra touch, feel free to adorn the brownies with festive sprinkles or a drizzle of melted chocolate. The possibilities are endless!
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