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Vegan Guinness Brownie on a plate with fresh berries.
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5 from 2 votes

Vegan Guinness Brownies

My vegan Guinness brownies are dense and fudgy, packed with decadent chocolate flavor and a subtle depth from the addition of Guinness beer. They’re perfect for celebrating St. Patrick’s Day, or for enjoying any time a chocolate craving strikes.
Prep Time15 minutes
Cook Time50 minutes
Total Time1 hour 5 minutes
Course: Dessert
Cuisine: American
Servings: 16
Calories: 242kcal
Author: Alissa Saenz

Ingredients

  • 1 (14.9 ounce/440 ml) can Guinness beer
  • ½ cup unsweetened and unflavored non-dairy milk
  • 2 tablespoons ground flaxseed
  • ½ cup vegan butter
  • 6 ounces vegan chocolate chips
  • ¼ cup vegetable oil
  • ¾ cup organic granulated sugar
  • ½ cup organic brown sugar
  • 2 teaspoons vanilla extract
  • 1 ¼ cups all-purpose flour
  • ¼ cup unsweetened cocoa powder
  • 1 teaspoon ground cinnamon (optional)
  • ½ teaspoon salt
  • teaspoon baking soda

For Topping (Optional)

  • Vegan chocolate frosting (about ⅓ of a batch)

Instructions

  • Pour the Guinness into a small saucepan and place it over medium heat. Bring the Guinness to a low boil, then lower the heat and let it simmer until it reduces to about ½ cup, about 20 minutes (Note 1). Let the Guinness cool until it's just barely lukewarm or cooler (Note 2). You can start to prepare your other ingredients while the Guinness cools.
  • Preheat the oven to 350°F and line the bottom and sides of a 9 x 9 inch baking pan with parchment paper. Leave a little overhang, which you'll later use to remove the brownies from the pan.
  • Whisk the non-dairy milk and ground flaxseed together in a small bowl. Let the mixture sit for at least five minutes, to gel.
  • While the flax mixture sits, place the butter and chocolate chips into a large, microwave-safe mixing bowl. Microwave them in 30 second increments, stirring in between, until they're completely melted and smooth. It should only take about two or three zaps (Note 3).
  • Whisk the reduced Guinness into the melted chocolate mixture, followed by the oil, flax mixture, sugar, brown sugar, and vanilla extract.
  • Add the flour, then sprinkle the cocoa powder, cinnamon (if using), baking soda, and salt over the flour. Whisk just until the ingredients are combined.
  • Pour the batter into the prepared baking pan. Bake the brownies for 30 to 35 minutes, until a toothpick inserted into the center comes out clean.
  • Place the pan on a cooling rack and let the brownies cool completely.
  • Once the brownies are cool, remove them from the pan by gently pulling upwards on the excess parchment paper.
  • Optionally, frost the brownies. Cut them into squares.
  • Serve.

Notes

  1. This will reduce the Guinness to about a quarter of its initial volume. The easiest way to gauge when it's ready is by using a saucepan with volume measurements displayed on the inside. If you don't have one, you'll need to measure it in a liquid measuring cup. Be super careful when doing this, as abrupt temperature changes could cause the measuring cup to break. Warm your measuring cup up under hot water before adding the reduced Guinness.
  2. Transferring the Guinness to a cool vessel or placing the pot in a cold water bath can speed this up.
  3. You could also melt them in a double boiler, if preferred.
  4. Recipe adapted from Guinness Brownies by Sally's Baking.
  5. Nutrition information does not include frosting.

Nutrition

Serving: 1brownie (1/16 of recipe) | Calories: 242kcal | Carbohydrates: 32g | Protein: 2g | Fat: 12g | Saturated Fat: 4g | Polyunsaturated Fat: 4g | Monounsaturated Fat: 3g | Trans Fat: 0.1g | Sodium: 140mg | Potassium: 51mg | Fiber: 2g | Sugar: 21g | Vitamin A: 270IU | Vitamin C: 0.01mg | Calcium: 36mg | Iron: 2mg