Brown Butter Brookies Recipe

Brown Butter Brookies Recipe packs fudgy brownie swirls and chewy, nutty cookie pockets into one pan, with toffee notes from browned butter and shiny crackly tops. Dessert fans who want a big payoff with minimal fuss can knock this out in about 1 hour 10 minutes from start to first bite. I baked a test pan last week and had to hide a square from my spouse.

Why Brown Butter Brookies Recipe Is Worth It

Brown Butter Brookies Recipe gives you the best of both worlds in every bite. Browned butter adds deep, nutty flavor to the cookie dough, while the brownie batter stays rich and fudgy with crisp edges. You bake one pan, yet it tastes like two desserts decided to team up.

You also get easy make-ahead flexibility. The doughs chill well, the bars slice clean, and they travel like champs for parties or bake sales.

These bars hit that sweet spot of crackly brownie tops and caramel-y cookie chew, and every bite tastes like the corner piece you fight over. ★★★★★

Ingredients You Need

• For the brownie batter

  • 1/2 cup unsalted butter, melted and warm, 113 g
  • 3/4 cup granulated sugar, 150 g
  • 1/4 cup packed light brown sugar, 50 g
  • 2 large eggs, room temp
  • 1 1/2 teaspoons vanilla extract
  • 1/2 cup all-purpose flour, 64 g
  • 1/2 cup Dutch-process cocoa powder, 42 g; Hershey’s Special Dark or Valrhona both work
  • 1/2 teaspoon fine sea salt
  • 1/4 teaspoon baking powder
  • 1/2 cup chocolate chips or chunks, 85 g, optional

• For the brown butter chocolate chip cookie dough

  • 1/2 cup unsalted butter, 113 g, browned and cooled to room temp, yields about 90 g browned butter
  • 1/2 cup granulated sugar, 100 g
  • 1/2 cup packed dark brown sugar, 110 g; light brown sugar works
  • 1 large egg, room temp
  • 2 teaspoons vanilla extract
  • 1 1/4 cups all-purpose flour, 150 g
  • 1/2 teaspoon baking soda
  • 1/2 teaspoon fine sea salt
  • 1 cup chocolate chips or chopped chocolate, 170 g; I like Guittard or Ghirardelli
  • Optional add-ins: 1/2 cup toasted pecans or walnuts, 60 g

• Pantry shortcuts and notes

  • You can use a boxed brownie mix for the brownie layer and keep the brown butter cookie dough as written.
  • Use pre-chopped baking chocolate to save time. Bars still set nicely.
  • Swap half the chocolate chips for toffee bits if you want extra caramel crunch.

• Equipment

  • 9-inch square metal pan
  • Parchment paper
  • Medium saucepan
  • 2 mixing bowls
  • Whisk and spatula
  • Hand mixer optional
  • Kitchen scale optional

Quick Tips & substitutions

• Brown the butter until the milk solids turn deep amber and smell nutty, then cool it 15 minutes so it does not scramble the egg.
• Keep both mixtures thick. Thick batter and dough give you defined swirls and chewy texture.
• Line the pan with a parchment sling so you can lift the bars out cleanly.
• Use Dutch-process cocoa for darker color and smooth flavor. Natural cocoa works but tastes a bit sharper.
• Add 1 teaspoon instant espresso to the brownie batter for bolder chocolate.
• Go gluten free with a cup-for-cup baking blend. Pick one with xanthan gum for best structure.
• Chill the cookie dough 10 minutes if it feels loose. Cool dough keeps the swirls from melting into the brownie layer.
• If your kitchen runs warm, pop the assembled pan in the fridge 10 minutes before baking for cleaner marbling.

How to Make Brown Butter Brookies Recipe

Brown the butter for the cookie dough, 10 minutes

• Add 113 g butter to a saucepan over medium heat. Stir until the butter foams, the bits turn amber, and it smells nutty, about 5 to 7 minutes.
• Pour into a heatproof bowl, scrape in all the browned bits, and cool 15 minutes.

Mix the brownie batter, 8 minutes

• Whisk warm melted butter, granulated sugar, and brown sugar until glossy. Add eggs and vanilla, then whisk 1 minute until the mixture thickens and lightens.
• Sift in flour, cocoa, salt, and baking powder. Fold until you see no dry spots. Fold in chocolate chips if using.

Mix the cookie dough, 6 minutes

• Whisk the cooled browned butter with granulated and brown sugars until smooth. Add the egg and vanilla, then whisk until creamy.
• Stir in flour, baking soda, and salt until combined. Fold in chocolate and nuts if using.

Pan prep and assembly, 5 minutes

• Heat oven to 350°F. Line a 9-inch square metal pan with parchment, leaving overhang on two sides.
• Spread about two thirds of the brownie batter in the pan. Drop heaping tablespoon scoops of cookie dough all over. Spoon the remaining brownie batter in the gaps. Use a butter knife to marble with three or four gentle swipes.

Bake, 30 to 35 minutes

• Bake until the top looks set and shiny, and a toothpick in the center shows moist crumbs, not wet batter. Start checking at 30 minutes.
• Rotate the pan once if your oven browns unevenly.

Cool and slice, 25 minutes

• Cool the pan on a rack at least 20 to 30 minutes so the layers firm up.
• Lift out with the parchment and cut 16 bars with a hot knife for clean edges.

Variations

• Salted caramel: Swirl 1/4 cup thick caramel sauce into the top, then sprinkle flaky salt after baking.
• Peanut butter: Swap 1/2 cup of the chocolate chips in the cookie dough for peanut butter chips and add 2 tablespoons peanut butter to the brownie batter.
• Mocha: Add 2 teaspoons instant espresso to the brownie batter and 1 teaspoon finely ground coffee to the cookie dough.
• Double chocolate chunk: Use chopped dark and milk chocolate mix for pools that stay gooey.
• Nut lover: Add toasted pecans to the cookie dough and chopped hazelnuts to the brownie batter.

Ways to Serve

• Warm with a scoop of vanilla ice cream and a sprinkle of flaky salt.
• Room temp with a cold glass of milk or cold brew coffee.
• Crumble over yogurt for a weekend treat.
• Reheat a square in the microwave for 10 to 12 seconds for gooey chips.

Storage

Cool the brookies completely, then store in an airtight container at room temp for up to 4 days. Slip in a slice of sandwich bread to keep them soft. Freeze cut bars for up to 2 months, double wrapped to prevent freezer smells. Thaw at room temp or warm in a low oven for a few minutes to revive the edges.

Ally Sanders

Brown Butter Brookies Recipe

Brown Butter Brookies Recipe packs fudgy brownie swirls and chewy, nutty cookie pockets into one pan, with toffee notes from browned butter and shiny crackly tops.

Pin This Recipe Share on Facebook

Prep Time 35 minutes mins

Cook Time 35 minutes mins

Total Time 1 hour hr 10 minutes mins

Servings: 16

Course: Dessert

Ingredients

  

• 1/2 cup unsalted butter, melted and warm (113 g)
• 3/4 cup granulated sugar (150 g)
• 1/4 cup packed light brown sugar (50 g)
• 2 large eggs, room temperature
• 1 1/2 teaspoons vanilla extract
• 1/2 cup all-purpose flour (64 g)
• 1/2 cup Dutch-process cocoa powder (42 g)
• 1/2 teaspoon fine sea salt
• 1/4 teaspoon baking powder
• 1/2 cup chocolate chips or chunks (85 g), optional

• 1/2 cup unsalted butter, browned and cooled to room temperature (113 g, yields about 90 g browned butter)
• 1/2 cup granulated sugar (100 g)
• 1/2 cup packed dark brown sugar (110 g)
• 1 large egg, room temperature
• 2 teaspoons vanilla extract
• 1 1/4 cups all-purpose flour (150 g)
• 1/2 teaspoon baking soda
• 1/2 teaspoon fine sea salt
• 1 cup chocolate chips or chopped chocolate (170 g)
• 1/2 cup toasted pecans or walnuts (60 g), optional

Instructions

 

1. Add 113 g butter to a saucepan over medium heat. Stir until the butter foams, the bits turn amber, and it smells nutty, about 5 to 7 minutes.
2. Pour into a heatproof bowl, scrape in all the browned bits, and cool for 15 minutes.

1. Whisk the warm melted butter, granulated sugar, and brown sugar until glossy.
2. Add the eggs and vanilla, then whisk for about 1 minute until the mixture thickens and lightens slightly.
3. Sift in the flour, cocoa powder, salt, and baking powder. Fold until no dry spots remain.
4. Fold in the chocolate chips or chunks, if using.

1. Whisk the cooled browned butter with the granulated sugar and dark brown sugar until smooth.
2. Add the egg and vanilla, then whisk until creamy.
3. Stir in the flour, baking soda, and salt just until combined.
4. Fold in the chocolate and nuts, if using.

1. Heat the oven to 350°F (175°C). Line a 9-inch square metal pan with parchment paper, leaving overhang on two sides for a sling.
2. Spread about two thirds of the brownie batter evenly in the prepared pan.
3. Drop heaping tablespoonfuls of cookie dough all over the brownie layer.
4. Spoon the remaining brownie batter into the gaps between the cookie dough mounds.
5. Use a butter knife to gently marble the two mixtures together with three or four slow swipes, without overmixing.

1. Bake for 30 to 35 minutes, until the top looks set and shiny and a toothpick inserted in the center comes out with moist crumbs but no wet batter. Start checking at 30 minutes.
2. Rotate the pan once during baking if your oven browns unevenly.

1. Cool the pan on a rack for at least 20 to 30 minutes so the layers can firm up.
2. Use the parchment sling to lift the brookies out of the pan.
3. Cut into 16 bars with a hot knife for clean edges.

Notes

Nutrition Information
Approximate per 1 of 16 bars: 310 calories; fat 17 g; saturated fat 10 g; carbohydrates 38 g; fiber 2 g; sugars 28 g; protein 4 g; sodium 180 mg. Values will vary based on specific ingredients, add-ins, and portion size.