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Coffee Brownies with Mocha Frosting Recipe

5 from 113 reviews

Deliciously rich and fudgy coffee brownies enhanced with a concentrated coffee flavor and topped with a smooth mocha frosting. Perfect for coffee lovers who want a decadent twist on classic brownies.

Ingredients

Scale

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, be sure to measure 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. Reduce Coffee: Pour 8 ounces (240mL) of strong brewed coffee into a small saucepan. Heat over medium heat until it boils, then reduce the coffee down to 2 tablespoons by simmering. Remove from heat and set aside.
  2. Prepare Pan and Oven: Preheat oven to 350ºF (177ºC). Line an 8″ or 9″ square baking pan with foil and spray the foil with nonstick spray. Set aside.
  3. Melt Chocolate and Butter for Brownies: In a medium saucepan over medium heat, melt ½ cup (113g) unsalted butter and 8 ounces (227g) semi-sweet chocolate, stirring frequently until completely smooth. Remove from heat and allow to cool for about 15 minutes.
  4. Mix Brownie Batter: Whisk both sugars (¾ cup light brown sugar and ¼ cup granulated sugar) into the cooled chocolate mixture until combined. Add the eggs one at a time, whisking after each addition until smooth. Whisk in 1 tablespoon of the concentrated coffee. Gently fold in ¾ cup all-purpose flour and ¼ teaspoon salt just until combined.
  5. Bake Brownies: Pour the batter into the prepared pan and bake for 25-30 minutes, or until a toothpick inserted in the center comes out mostly clean. Allow brownies to cool completely before frosting.
  6. Melt Chocolate and Butter for Frosting: In a small saucepan over medium heat, melt 2 ounces (40g) unsweetened baking chocolate and 4 tablespoons (57g) unsalted butter. Remove from heat and let cool for 15 minutes.
  7. Prepare Mocha Frosting: In a medium bowl, using a handheld mixer or stand mixer with paddle attachment, combine the cooled chocolate/butter mixture, 1 tablespoon concentrated coffee, and 1 tablespoon milk or cream. Mix on low speed and slowly add 2 cups (240g) powdered sugar. Increase mixer speed to medium and beat until completely combined, scraping down the sides as needed. Add a pinch of salt to taste. If frosting is too thick, add the additional tablespoon of milk or cream as needed.
  8. Frost Brownies: Using the foil overhang, lift the brownies out of the pan and place the brownie block onto a cutting board. Peel back the remaining foil and spread the mocha frosting evenly over the top of the brownies.
  9. Serve and Store: Cut into individual servings. Store leftover brownies at room temperature for up to 1 week or freeze for up to 3 months. Thaw frozen brownies overnight in the refrigerator before serving.

Notes

  • Ensure eggs are at room temperature for better mixing and texture.
  • Measure flour properly by spooning it into the cup and leveling with a knife to avoid dense brownies.
  • Reduce coffee carefully to avoid burning; low to medium heat is best.
  • Brownies are best after fully cooled and frosted for the frosting to set properly.
  • Use high-quality chocolate for best results and flavor depth.
  • Milk or cream amount in frosting can be adjusted for desired consistency.
  • Brownies freeze well; wrap tightly before freezing to maintain freshness.

Keywords: coffee brownies, mocha frosting, chocolate brownies, coffee dessert, baked brownies, rich brownies