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3-Ingredient Brownie Cookies Recipe

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4.1 from 14 reviews

These 3-Ingredient Brownie Cookies are a simple, quick, and delicious treat perfect for chocolate lovers. Made with just a boxed brownie mix, melted butter, and an egg, these cookies offer a fudgy texture with optional chocolate chips and flaky salt for an extra touch of decadence. They bake up shiny in the center and keep wonderfully soft, ideal for an easy homemade dessert or snack.

Ingredients

Basic Ingredients

  • 1/2 cup (1 stick) unsalted butter, melted and cooled slightly
  • 1 large egg
  • 1 (18 to 19-ounce) box brownie mix, preferably Ghirardelli’s

Optional Add-Ins

  • 1/3 cup dark or semi-sweet chocolate chips
  • Flaky salt, for finishing

Instructions

  1. Preheat the Oven: Set your oven to 350°F and position the oven racks in the top third and bottom third of the oven. Line two large baking sheets with parchment paper to prevent sticking and ensure even baking.
  2. Prepare the Batter: In a medium mixing bowl, add the slightly warm (not hot) melted butter. Crack in the large egg and stir thoroughly until combined. Then add the boxed brownie mix and stir until the dry ingredients are fully incorporated with no visible pockets of dry mix.
  3. Shape the Cookies: Using a medium cookie scoop or a heaping tablespoon, scoop out 1 1/2 tablespoon mounds of the batter. Place them at least 2 inches apart on the prepared baking sheets. Optionally, gently press 3 to 4 chocolate chips on top of each cookie and sprinkle with flaky salt for enhanced flavor.
  4. Bake the Cookies: Bake the cookies for 11 to 12 minutes, swapping the baking sheets from top to bottom halfway through to promote even baking. You want the centers to look shiny but not wet when done.
  5. Cool and Serve: Let the cookies cool for a few minutes on the baking sheets. Then, using a thin metal spatula, carefully transfer them to a cooling rack. Repeat with remaining batter. Serve warm or at room temperature for the best texture and flavor.

Notes

  • Ensure the melted butter is only slightly warm to avoid cooking the egg prematurely.
  • Spacing cookies at least 2 inches apart allows for even spreading and prevents them from merging.
  • Swapping baking sheets halfway through ensures even heat distribution and consistent baking.
  • Flaky salt is optional but adds a delightful contrast to the rich chocolate flavor.
  • These cookies are best enjoyed within a couple of days but can be stored in an airtight container at room temperature.