Guinness Chocolate Brownies

Moist, rich, chocolatey Guinness brownies, a perfect treat for St Patricks day!

  • Prep time: 5 minutes
  • Cook time: 55 minutes
  • Yield: Makes 16 to 25 brownies


  • 1 cup (240 ml) Guinness Extra Stout
  • 10 Tbsp (1 1/4 sticks, 140 g) butter
  • 1 1/4 cup (250 g) sugar
  • 3/4 cup plus 2 Tbsp (85 g) unsweetened natural cocoa
  • 1/4 teaspoon salt
  • 1/4 teaspoon cinnamon
  • 2 teaspoons vanilla
  • 2 large eggs, lightly beaten
  • 3/4 cup (96 g) flour
  • 2/3 cup  (90 g) chopped pecans (optional)


1 Boil Guinness, reduce by half: Place the Guinness stout in a medium saucepan (2-quart) and bring to a boil. Watch out for the stout bubbling up too much. Boil until the liquid reduces by half.

2 Progressively add butter, sugar, cocoa, salt, cinnamon to the Guinness, then let cool: Stir the butter into the reduced Guinness until melted. Add the sugar and whisk until dissolved. Whisk in the cocoa, salt, and cinnamon. Whisk until smooth. Remove from heat and let cool until just lightly warm to the touch.

3 Prepare an 8x8 baking pan: Line a square baking pan with parchment paper or foil in a way that there is overhang over two sides of the dish making it easy to remove the brownies once they are baked. Brush with a little butter or baking spray.

4 Preheat oven to 350°F.

5 Stir in the vanilla, eggs, flour, nuts: When the mixture has cooled until just lightly warm to the touch, stir in the vanilla extract and eggs. Stir in the flour until smooth. Stir in the nuts.

6 Bake: Pour into the prepared lined baking pan. Bake at 350°F for 30 minutes. Cool on a rack. When completely cool lift the brownies out of the pan. Cut into 16 to 25 squares or rectangles.

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  • [email protected]

    What a good idea to include Guiness. I make a similar recipe but with Stout. Will give this a try. When I lived in the US, it always amazed me that people with no Irish ties nor heritage chose to celebrate St Paddy’s day in such a big way. Just an excuse for a party if you ask me. Even in London, where I lived for a while, it was not as big as in the US. Interesting???

  • Gail Walker

    do you use all-purpose flour in brownies?

  • marjan

    which ingredients we can replace with Guinness ?