Thin, Crispy Brownie Brittle

This thin, crispy brownie brittle delivers all the fudgy chocolate flavor of a brownie but bakes into crackly, snackable shards. It comes together in one bowl with no chilling, so you can be snapping into a piece in under an hour.

The batter spreads across a whole sheet pan and bakes until the edges turn deep brown and the center sets just enough to hold that brittle crunch. It’s the kind of treat you keep coming back to for one more piece.

Why This Brownie Brittle Stays in the Rotation

The texture is the whole point here. You get a loud, satisfying snap with every bite, but the chocolate taste stays rich and dark, not dusty or dry.

It keeps its crunch for a full week at room temperature, which makes it a great thing to have around for afternoon coffee or tucked into a lunchbox. The recipe is forgiving too, thin spots get extra lacy and crisp, while slightly thicker pockets stay a little chewy.

Ingredients

• 1/2 cup (1 stick) unsalted butter, cut into pieces: for even melting
• 4 oz semisweet chocolate, chopped: chocolate chips work fine here
• 1 cup granulated sugar: regular white sugar gives the best crisp texture
• 2 large eggs: at room temperature so the batter stays smooth
• 1 tsp vanilla extract
• 1/2 cup all-purpose flour: spooned and leveled
• 1/4 cup unsweetened cocoa powder: Dutch-process or natural both work
• 1/4 tsp fine sea salt
• 1/4 cup mini semisweet chocolate chips, optional: adds extra chocolate pockets and crunch

Variations / Substitutions

• Darker chocolate: use bittersweet (60 to 70 percent cacao) for a less sweet brittle with more intensity. Cut the sugar by 2 tablespoons if you go above 70 percent.
• Espresso boost: add 1 teaspoon of instant espresso powder to the dry ingredients to deepen the chocolate flavor without tasting like coffee.
• Nutty crunch: scatter a few tablespoons of finely chopped toasted almonds or pecans over the batter before baking.
• Gluten-free: swap the all-purpose flour for a measure-for-measure gluten-free flour blend.
• Dairy-free: use a good vegan butter and dairy-free chocolate chips.

If you love the crackly edges of a pan of brownies, try a batch of Chewy Mocha Brownies next.

How to Make Brownie Brittle

Step 1: Melt the Chocolate

Place the 1/2 cup of butter and 4 oz of chopped semisweet chocolate in a microwave-safe bowl. Heat in 20-second bursts, stirring after each, until the mixture is fully melted and smooth, about 60 to 90 seconds total. Let the bowl sit for 5 minutes so the chocolate cools down a little and won’t scramble the eggs later.

Step 2: Mix the Batter

Whisk the 1 cup of sugar into the cooled chocolate mixture until it’s fully incorporated. Add the 2 eggs one at a time, whisking well after each, then stir in the 1 tsp vanilla. In a separate small bowl, whisk the 1/2 cup flour, 1/4 cup cocoa powder, and 1/4 tsp salt. Fold the dry ingredients into the wet mixture with a spatula just until no streaks of flour remain. The batter will be thick and glossy.

Step 3: Spread and Bake

Preheat the oven to 325°F (160°C) and line a 13 by 18-inch half-sheet pan with parchment paper. Scrape the batter onto the pan and use an offset spatula to spread it into the thinnest, most even layer you can. Aim for about 1/8 inch (3 mm) thick; the edges should look almost see-through. Sprinkle the optional mini chocolate chips over the top. Bake on the middle rack for 18 to 22 minutes, until the edges are deep brown and the center feels mostly firm when you press it lightly. The brittle will still seem a little soft but will crisp dramatically as it cools.

Step 4: Snap into Shards

Let the brittle cool completely on the baking sheet, at least 30 minutes. Once it feels dry and firm to the touch, lift the parchment and break the whole sheet into irregular, crackly pieces with your hands. Pile the shards into a bowl or onto a plate and serve right away, or transfer to an airtight container for later.

Getting the Crunch Just Right

• Spread the batter while it’s still slightly warm. Once it hits the cool pan it starts to set and becomes harder to push thin.
• Think thinner than you expect. Any spots thicker than a scant 1/4 inch will stay chewy instead of snapping.
• Start checking at 18 minutes and look for a matte, dry surface with no wet batter in the center. It keeps firming up on the hot pan after you pull it out.
• Let it cool entirely on the sheet. Moving it early traps moisture and softens the brittle.

Bake time depends on how thin you spread the batter:

Storing Brownie Brittle So It Stays Crisp

• Store: Keep the brittle in an airtight container at room temperature for up to 1 week. Refrigerating it will introduce moisture and turn the shards soft.

Frequently Asked Questions

Why did my brittle turn out soft and chewy?

It was likely underbaked or spread too thick. For a true snap, the batter needs to be very thin and baked until the center is dry and firm.

Can I make this using only cocoa powder instead of melted chocolate?

You can, though the result will be drier and less fudgy. Replace the 4 oz of chocolate with 1/4 cup melted butter and 1/2 cup cocoa powder, and add 2 extra tablespoons of sugar.

Can I use dark chocolate instead of semisweet?

Yes. Bittersweet or dark chocolate up to 70 percent cacao works well. The brittle will be less sweet with a deeper chocolate flavor.

How do I add nuts without ruining the crispness?

Stir finely chopped toasted nuts into the batter or scatter them on top before baking. Keep the pieces small so the brittle still shatters cleanly.

Brownie Brittle Recipe

Print Recipe Pin Recipe

Prep Time 10 minutes mins

Cook Time 20 minutes mins

Total Time 30 minutes mins

Servings: 8 servings

Calories: 325

Ingredients Method Notes

Ingredients

  

• 1/2 cup unsalted butter, cut into pieces
• 4 oz semisweet chocolate, chopped
• 1 cup granulated sugar
• 2 large eggs, at room temperature
• 1 tsp vanilla extract
• 1/2 cup all-purpose flour
• 1/4 cup unsweetened cocoa powder
• 1/4 tsp fine sea salt
• 1/4 cup mini semisweet chocolate chips (optional)

Method

 

1. Melt the butter and chocolate together in the microwave in 20-second bursts, stirring until smooth. Let cool for 5 minutes.
2. Whisk the sugar into the chocolate mixture, then add the eggs one at a time and the vanilla.
3. Whisk the flour, cocoa powder, and salt in a small bowl, then fold them into the wet mixture just until no dry streaks remain.
4. Scrape the batter onto a parchment-lined half-sheet pan and spread it very thin, about 1/8 inch thick. Sprinkle with chocolate chips if using.
5. Bake at 325°F for 18 to 22 minutes, until the edges are deep brown and the center feels firm. Cool completely on the pan.
6. Break the cooled sheet into shards and serve.

Notes

The brittle must cool fully on the baking sheet before you break it, it finishes crisping as it sits. On humid days, tuck a silica packet or a few dry rice grains into the storage container to keep it from softening.