Brown Butter Brookie Cups with Gooey Centers Step-by-step instructions

Before you start

Before starting, gather all ingredients and let the egg come to room temperature if possible. Heat the oven to 350°F (175°C). Lightly grease a 12-cup muffin tin or line with paper liners.

Have the cookie dough ready: if using store-bought, let it sit at room temperature for about 10 minutes so it is easier to scoop. Measure out all dry ingredients and set them nearby. The entire process moves quickly once the butter is browning, so having everything within reach will make the recipe seamless.

Instructions

Brown Butter & Batter

1. 1Brown the Butter
   Melt the butter in a small saucepan over medium heat. Cook, swirling occasionally, until the butter turns golden brown and smells nutty, about 3 to 4 minutes. Remove from heat and let cool slightly.
   Look for The butter will foam and then turn a deep amber color with a nutty aroma.
   Tip Watch closely: burnt butter tastes bitter. Remove from heat as soon as it smells nutty.
2. 2Mix the Brownie Batter
   In a medium bowl, whisk the browned butter with cocoa powder, sugar, egg, and vanilla until smooth. Add the flour and salt, and stir just until combined. The batter will be thick.
   Look for The batter should be glossy and thick, with no dry streaks of flour.
   Tip Do not overmix; stir until the flour disappears to keep the brownies fudgy.

The butter should be a deep amber color with a nutty aroma, and the batter should be thick, glossy, and well combined. There should be no streaks of flour, but do not overmix. The batter will look almost like a thick chocolate paste, which is exactly what you want for a fudgy texture.

Assemble & Bake

3. 3Fill the Muffin Tin
   Spoon the brownie batter into the cups of a 12-cup muffin tin, filling each about halfway. The batter will be thick; use a small spoon or cookie scoop to divide evenly.
   Look for Each cup should have an even layer of brownie batter, about 1 to 2 tablespoons.
   Tip Grease the muffin tin lightly or use paper liners for easy removal.
4. 4Top with Cookie Dough
   Scoop a rounded tablespoon of chocolate chip cookie dough onto each brownie layer. Press it down gently so it spreads slightly but does not cover the brownie entirely.
   Look for The cookie dough should sit on top, leaving a ring of brownie visible around the edges.
   Tip If the dough is too sticky, chill it for 10 minutes before scooping.

Each muffin cup should have an even layer of brownie batter, topped with a rounded scoop of cookie dough. As they bake, the edges will caramelize and turn golden brown, while the tops puff up slightly.

The kitchen will smell of toasted butter and chocolate. The cups are done when the edges are deeply golden and the tops are set but still soft.

Finish & Serve

5. 5Bake the Brookie Cups
   Heat the oven to 350°F (175°C). Bake the brookie cups for 14 minutes, until the edges are golden brown and the tops are set but still slightly soft in the center.
   Look for The edges will look caramelized and the tops will be puffed and lightly cracked.
   Safe temperature 160°F (71°C) internal temperature (egg dishes)
   Tip Do not overbake; the centers should remain fudgy. A toothpick inserted near the edge should come out with moist crumbs.
6. 6Finish with Sea Salt
   Remove the brookie cups from the oven and let them cool in the pan for 5 minutes. Then transfer to a wire rack. While still warm, sprinkle with flaky sea salt.
   Look for The salt crystals will glisten and add a savory crunch to the sweet tops.
   Tip Sprinkle the salt while the cups are warm so it adheres; serve warm for the gooey center.

After cooling briefly, the brookie cups should release easily from the pan. The tops will be a rich golden brown with a slightly crackly surface. Sprinkling with flaky sea salt while warm adds a savory crunch. When pulled apart, the center should be gooey and fudgy, with melted chocolate chips from the cookie dough.

Common mistakes

One common mistake is overbaking, which dries out the brownie layer and makes the cookie top hard. Keep a close eye on the timer and trust the visual cues: golden edges and a slightly soft center. Another pitfall is using cold cookie dough that does not spread, leaving large lumps on top.

Let the dough sit at room temperature briefly, or flatten each scoop slightly before placing it on the brownie. Finally, do not skip browning the butter—this step adds essential flavor and cannot be replaced with plain melted butter.

How to tell it’s done

The brookie cups are done when the edges have turned a deep golden brown and the tops are set but still slightly soft to the touch. A toothpick inserted into the cookie layer should come out with a few moist crumbs, not wet batter.

The internal temperature of the egg-containing batter should reach 160°F (71°C) to ensure food safety. Let them cool in the pan for 5 minutes; they will continue to set as they cool. The centers should remain fudgy and gooey, so do not overbake.

• Egg dishes: 160°F (71°C) in the thickest part