Fudgy Gluten-Free Brookies: Brownie Cookie Bars

Part decadent brownie, part chocolate chip cookie—these Gluten-Free Brookies blend the best of both worlds into one irresistible treat. Fudgy brownie and chewy cookie come together in every bite for a dessert that’s as simple to make as it is impressive to serve.

I’m a big fan of mashups—combining two favorites into one playful recipe. These brookies are my favorite kind of mashup: half chocolate chip cookie, half fudgy brownie, and completely delicious. They look fancy, but use common pantry ingredients and straightforward steps.

Brookies = brownies + cookies.

This recipe layers a chewy chocolate chip cookie base with a dense, glossy brownie filling and finishes with small dollops of cookie dough on top so every bite shows both textures. Below I break down the ingredients and steps so you can make them with confidence.

Simple Ingredients For These Two Delicious Layers

These gluten-free brookie bars use familiar baking staples. Each layer shares some ingredients, which keeps the recipe streamlined and pantry-friendly. Here’s a quick overview of what you’ll need for each layer:

• The Cookie Layer: softened butter, light brown sugar, granulated sugar, an egg, vanilla, a 1:1 gluten-free flour blend (with xanthan gum), baking soda, salt, and chocolate chips.
• The Brownie Layer: butter, chocolate chips, granulated sugar, an egg, vanilla, a 1:1 gluten-free flour blend, unsweetened cocoa powder (natural, not Dutch-processed), and a pinch of salt.

Key Ingredient: Gluten-Free Flour

This recipe relies on a 1:1 gluten-free flour blend that includes xanthan gum to mimic the structure of wheat flour. Using a measure-for-measure blend will give the best texture. Avoid alternative single-ingredient flours like coconut, almond, or oat flour for this recipe, as they change absorbency and structure.

Weighing ingredients when possible: For consistent results, weigh flour and other dry ingredients with a kitchen scale. If you don’t have a scale, use the scoop-and-level method to avoid packing too much flour into your measuring cup.

How To Make Gluten-Free Brookies, Step By Step

The full recipe card with ingredient amounts and timings is included below.

First, Make The Chocolate Chip Cookie Layer

1. Preheat and prepare: Preheat the oven to 350°F. Line an 8×8 metal baking pan with parchment paper and set aside.
2. Cream butter and sugars: In a large mixing bowl or stand mixer bowl, cream together softened butter, packed light brown sugar, and granulated sugar for 2–3 minutes until light and fluffy. Scrape down the bowl.
3. Add egg and vanilla: Mix in the egg, then the vanilla, until fully combined.
4. Mix dry ingredients: Add the gluten-free flour blend, baking soda, and salt. Mix until nearly combined; a few floury streaks are fine.
5. Fold in chips: Stir in the chocolate chips until the dough comes together. The dough will be softer than traditional cookie dough—do not add extra flour.
6. Portion the dough: Divide the dough roughly so about two-thirds is reserved for the bottom layer and one-third for the top.

Then, Make The Brownie Batter

1. Melt butter and chocolate: Gently melt butter and chocolate together in a small saucepan over low heat or in short bursts in the microwave, stirring until smooth and glossy. Allow to cool slightly.
2. Beat sugar, egg, and vanilla: In a medium bowl, whisk the granulated sugar, egg, and vanilla for 2–3 minutes until the sugar has dissolved and the mixture is lighter in color. This step helps produce glossy brownie tops.
3. Combine: Stir the melted chocolate into the egg mixture until fully incorporated.
4. Add dry ingredients: Fold in the gluten-free flour, unsweetened cocoa powder, and salt until just combined and no dry streaks remain.

Assemble & Bake Your Brookie Bars

1. Press cookie base: Use the two-thirds portion of cookie dough and press it into an even layer across the bottom of the prepared pan. It’s okay if small gaps remain; the brownie layer will fill them.
2. Pour brownie batter: Spread the brownie batter gently and evenly over the cookie base.
3. Add cookie dough dollops: Divide the remaining cookie dough into roughly tablespoon-sized pieces, flatten them into small discs, and gently press them onto the surface of the brownie batter so the top is relatively even.
4. Top with extra chips: Sprinkle about 2 tablespoons of chocolate chips across the top for a finished look.
5. Bake uncovered: Bake for 20 minutes. The cookie tops should be golden at this point.
6. Finish under foil: Loosely tent the pan with foil (don’t seal) and bake an additional 4–6 minutes so the bars finish baking without over-browning the cookie pieces. For fudgier centers, remove earlier; for firmer centers, bake a bit longer.
7. Cool before slicing: Allow the pan to cool completely on a wire rack before slicing into bars so the centers set cleanly.
8. Store: Store finished brookies in an airtight container at room temperature for 2–3 days, or freeze for up to 2 months.

FAQ + Tips And Tricks For The Best Gluten-Free Brookies

Avoid over-baking. Because the center is mostly brownie, the ideal texture is fudgy. Pull the bars from the oven toward the earlier end of the time range if you want a gooier center. Let the bars cool completely to firm up before slicing.

Turn them into a sundae. Serve a warm brookie with a scoop of vanilla ice cream and a drizzle of chocolate sauce or hot fudge for an extra indulgent dessert.

Layer choice: The dollops of cookie dough on top create the signature brookie look and ensure each bite includes both cookie and brownie. You can, of course, try a simple two-layer approach, but the classic dollop method produces the best combined texture.

Boxed mixes? You can experiment with store-bought gluten-free brownie mix and premade cookie dough, but bake times and textures will vary. The timings and methods shown here are tuned for the homemade versions included in the recipe card below.

More Gluten-Free Cookie Bars To Try

Gluten-Free Chocolate Chip Cookie Bars

Gluten-Free Sugar Cookie Bars

Gluten-Free Monster Cookie Bars

Gluten-Free S’mores Bars

🌟 Did You Make This Recipe?

Tell me how it turned out! Leave a star rating and a comment to share your results and any variations you tried. Happy baking!