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Guinness Brownies

Guinness Brownies are moist and nutty and include a secret ingredient that amps up the flavor - Guinness Beer!
Course Dessert
Cuisine American
Keyword Guinness brownies, Hazelnut brownies
Prep Time 10 minutes
Cook Time 45 minutes
Total Time 55 minutes
Servings 9 bars
Author Ali Randall


  • 1/2 cup Guinness Stout
  • 6 ounces Dark chocolate chips
  • 1/2 cup butter, 1 stick
  • 1.5 cups sugar
  • 3 eggs
  • 1 teaspoon vanilla
  • 1/4 teaspoon baking soda
  • 1 cup flour
  • 1/2 cup chopped dry roasted hazelnuts


  • Preheat the oven to 350°F. Line a 9 x 9 inch pan with parchment paper.
  • Bring the beer to a boil and allow it to reduce by half, about 5 minutes. Cool completely.
  • In a large enough microwavable bowl, melt the chocolate and butter until the butter has melted, about a minute.
  • Remove the bowl from the microwave and continue to stir until chocolate is completely melted.
  • Pour the melted chocolate and butter into a large bowl or stand mixer. Add in the cooled beer, sugar, eggs and vanilla and beat until the sugar has dissolved.
  • Mix in the flour and baking soda. The batter should be glossy with no bubbles.
  • Pour the batter into the prepared pan and top with the chopped hazelnuts.
  • Bake for 45 minutes until a toothpick inserted in the center comes out clean.