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Irish Car Bomb Cupcakes with Guinness Buttercream

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Rich chocolate cupcakes infused with Guinness stout and topped with a silky, boozy Guinness buttercream. Perfect for celebrations or cozy afternoons.

Ingredients

Scale
  • 1 ½ cups (190g) all-purpose flour
  • ¾ cup (75g) unsweetened cocoa powder (preferably Dutch-process)
  • 1 teaspoon baking soda
  • ½ teaspoon salt
  • 1 cup (200g) granulated sugar
  • ¾ cup (180ml) buttermilk, room temperature
  • ½ cup (120ml) vegetable oil
  • 2 large eggs, room temperature
  • 1 teaspoon vanilla extract
  • ½ cup (120ml) Guinness stout
  • 1 cup (227g) unsalted butter, softened
  • 3 cups (360g) powdered sugar, sifted
  • 3 tablespoons (45ml) Guinness stout, reduced to syrup
  • 1 teaspoon vanilla extract (for buttercream)
  • Pinch of salt (for buttercream)

Instructions

  1. Preheat oven to 350°F (175°C) and line a 12-cup muffin tin with cupcake liners.
  2. In a large bowl, sift together flour, cocoa powder, baking soda, and salt. Whisk to combine.
  3. In another bowl, whisk sugar, vegetable oil, eggs, and vanilla extract until smooth. Stir in buttermilk and Guinness stout.
  4. Pour wet ingredients into dry ingredients and gently fold with a spatula until just combined; do not overmix.
  5. Spoon batter evenly into cupcake liners, filling about two-thirds full.
  6. Bake for 18-22 minutes or until a toothpick inserted in the center comes out clean or with a few moist crumbs.
  7. Transfer cupcakes to a cooling rack and cool completely before frosting.
  8. While cupcakes bake, pour ½ cup Guinness into a small saucepan over medium heat. Simmer gently until reduced to about 3 tablespoons of thick syrup (10-12 minutes). Let cool.
  9. Beat softened butter until creamy (2-3 minutes). Gradually add powdered sugar, mixing well between additions.
  10. Add vanilla extract, pinch of salt, and cooled Guinness reduction to butter mixture. Beat until light and fluffy, scraping sides as needed.
  11. Frost cooled cupcakes generously with Guinness buttercream using a piping bag or spatula.
  12. Optional: Sprinkle cocoa powder or chocolate shavings on top.

Notes

Reduce Guinness to a syrup before adding to buttercream to intensify flavor without watering down frosting. Use room temperature ingredients for best mixing. Avoid overbaking to keep cupcakes moist. For dairy-free frosting, substitute coconut oil for butter and use almond or oat milk with vinegar instead of buttermilk.

Nutrition

Keywords: Irish Car Bomb Cupcakes, Guinness cupcakes, chocolate cupcakes, buttercream frosting, St. Patrick's Day dessert, boozy cupcakes

Find it online: https://magnetmeal.com/irish-car-bomb-cupcakes-recipe-easy-homemade-guinness-buttercream-delight/