Brown butter brookies are a delightful mash-up of cookies and brownies that will satisfy all your dessert cravings in one bite. In just under an hour, you can transform simple ingredients into a decadent treat that boasts the rich, nutty flavor of brown butter complemented by gooey chocolate chips. This recipe works beautifully because melting the butter enhances its flavor, resulting in a cookie-brownie combination that’s irresistibly moist and packed with chocolatey goodness.
This recipe is perfect for chocolate lovers and is ideal for sharing at gatherings, parties, or a cozy night in. You can whip up a batch ahead of time, and they store beautifully, ready to impress whenever a sweet craving strikes.
Why You’ll Love This Recipe
- The combination of cookies and brownies offers the best of both worlds.
- The brown butter in the cookies adds a rich, nutty flavor.
- Each bite is filled with semi-sweet chocolate chips that melt in your mouth.
- They are easy to make, requiring just one baking dish.
What You’ll Need
Gather the ingredients to create these delicious brookies.
For the Cookie Layer
- 1/2 cup unsalted butter, melted and cooled
- 1/2 cup light brown sugar
- 1/3 cup granulated sugar
- 1 large egg, room temp
- 1 tbsp vanilla extract
- 1 1/4 cups all-purpose flour, spooned and leveled
- 1/2 tsp baking soda
- 1/2 tsp flaky sea salt
- 1 cup semi-sweet chocolate chips
For the Brownie Layer
- 1 cup unsalted butter
- 1/2 cup cocoa powder
- 1 tsp vanilla extract
- 1/2 cup light brown sugar
Use dark chocolate chips for a richer flavor.
Substitutions & Swaps
- Brown sugar can be replaced with coconut sugar.
- Use gluten-free flour for a GF version.
- Substitute vegetable oil for butter if needed.
- Use milk chocolate chips for a sweeter taste.
How to Make It
Prepare to indulge in these delicious brookies with these easy steps.
1. Preheat the oven
Preheat your oven to 350°F (175°C) and grease a 9×13 baking pan.
2. Mix the cookie ingredients
In a medium bowl, mix melted butter, brown sugar, and granulated sugar until smooth.

3. Combine with egg and vanilla
Add the egg and vanilla extract, stirring to combine until fully incorporated.
4. Whisk the dry ingredients
In another bowl, whisk together flour, baking soda, and flaky sea salt. Gradually add this mixture to the wet ingredients, mixing until just combined. Fold in the chocolate chips.
5. Spread the cookie batter
Pour the cookie batter into the prepared pan, spreading it evenly to cover the bottom.
6. Prepare the brownie batter
In a saucepan, melt the unsalted butter, then stir in cocoa powder. Remove from heat and stir in the light brown sugar and vanilla extract. Add eggs and mix well, followed by the flour.
7. Layer the brownie batter
Pour the brownie batter over the cookie layer and smooth it out evenly.
8. Bake the brookies
Bake for 25-30 minutes or until a toothpick inserted in the center comes out clean.
9. Cool and cut
Allow to cool completely before cutting into squares for serving.
How to Store It
Fridge: store in an airtight container for up to 5 days.
Freezer: yes, for up to 3 months.
Reheat: microwave for 15-20 seconds.
Tips for Best Results
- Allow the melted butter to cool to avoid cooking the egg.
- Don’t overmix the batter to maintain a chewy texture.
- Use fresh chocolate chips for optimal flavor.
- Be cautious when testing for doneness; they firm up as they cool.
Serving Suggestions
- Serve warm with a scoop of vanilla ice cream.
- Pair with a glass of milk for a classic treat.
- Great as a dessert for potlucks or birthday parties.




