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Coffee Brownies with Mocha Frosting Recipe

5 Stars 4 Stars 3 Stars 2 Stars 1 Star 4 from 46 reviews
  • Author: Lily
  • Prep Time: 15 minutes
  • Cook Time: 25 minutes
  • Total Time: 40 minutes
  • Yield: 16 brownies
  • Category: Dessert
  • Method: Baking
  • Cuisine: American

Description

These rich and fudgy Coffee Brownies are made from scratch, infused with concentrated coffee for a deep flavor, and topped with a luscious mocha frosting. Perfectly balanced between chocolate and coffee, these brownies are a decadent treat for any occasion.


Ingredients

Brewed Coffee Reduction

  • 8 ounces (240mL) strong coffee

Coffee Brownies

  • ½ cup (113g) unsalted butter, cut into 6-8 slices
  • 8 ounces (227g) semi-sweet chocolate, coarsely chopped
  • ¾ cup (150g) firmly packed light brown sugar
  • ¼ cup (50g) granulated sugar
  • 3 large eggs, room temperature preferred
  • 1 Tablespoon (15mL) concentrated coffee
  • ¾ cup (90g) all-purpose flour, measured properly
  • ¼ teaspoon salt

Mocha Frosting

  • 2 ounces (40g) unsweetened baking chocolate, coarsely chopped
  • 4 Tablespoons (57g) unsalted butter
  • 1 Tablespoon (15mL) concentrated coffee
  • 1 to 2 Tablespoons (15-30mL) milk or cream
  • 2 cups (240g) powdered sugar
  • Pinch of salt


Instructions

  1. Make coffee reduction: Pour 8 ounces (240mL) of strong brewed coffee into a small saucepan. Heat over medium heat until it boils, then reduce until the liquid concentrates down to about 2 Tablespoons. Remove from heat and set aside.
  2. Prepare baking pan and preheat oven: Preheat your oven to 350ºF (177ºC). Line an 8″ or 9″ square baking pan with foil and spray with nonstick cooking spray. Set aside.
  3. Melt butter and chocolate: In a medium saucepan over medium heat, melt ½ cup (113g) unsalted butter and 8 ounces (227g) semi-sweet chocolate, stirring frequently until the mixture is completely smooth. Remove from heat and allow it to cool for about 15 minutes.
  4. Combine sugars and eggs: Whisk ¾ cup (150g) light brown sugar and ¼ cup (50g) granulated sugar into the cooled chocolate mixture until well combined. Add the 3 eggs one at a time, whisking thoroughly after each addition until the batter is smooth.
  5. Add coffee and dry ingredients: Whisk in 1 Tablespoon (15mL) concentrated coffee. Then gently fold in ¾ cup (90g) all-purpose flour and ¼ teaspoon salt until just combined.
  6. Bake the brownies: Pour the batter into the prepared pan and bake for 25-30 minutes, or until a toothpick inserted into the center comes out mostly clean. Remove from oven and cool completely before frosting.
  7. Prepare mocha frosting: In a small saucepan over medium heat, melt 2 ounces (40g) unsweetened baking chocolate and 4 Tablespoons (57g) unsalted butter together. Allow to cool for 15 minutes.
  8. Mix frosting: In a medium bowl, using a handheld or stand mixer, combine the cooled chocolate-butter mixture with 1 Tablespoon (15mL) concentrated coffee and start with 1 Tablespoon of milk or cream. Mix on low speed, gradually adding 2 cups (240g) powdered sugar. Increase mixer speed to medium and beat until frosting is smooth and fully combined. Add a pinch of salt to taste.
  9. Frost and serve: Once brownies are cooled, lift them out of the pan using the foil overhang and place on a cutting board. Peel back the foil and spread the mocha frosting evenly over the top. Cut into 16 squares and serve.
  10. Storage: Store leftover brownies at room temperature for up to 1 week or freeze for up to 3 months. Thaw frozen brownies in the refrigerator overnight before serving.

Notes

  • Use room temperature eggs for better incorporation into the batter.
  • Be careful not to overbake the brownies to keep them fudgy.
  • Measure flour properly by spooning it into the cup and leveling for accuracy.
  • The concentrated coffee adds a deep mocha flavor; instant espresso powder can be used as an alternative if available.
  • Adjust the milk or cream in the frosting to achieve desired consistency.
  • Leftover brownies freeze well; wrap tightly to avoid freezer burn.