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Irish Whiskey Brownies

Irish Whiskey Brownies

Ultra-fudgy brownies infused with Irish whiskey and finished with a silky cocoa-whiskey glaze. Rich, bold, and perfect for sharing.
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Prep Time: 20 minutes
Cook Time: 30 minutes
Total Time: 50 minutes
Servings: 16

Ingredients
 

Main Ingredients

  • 9 tbsp unsalted butter cut into pieces
  • 6 oz chopped semisweet chocolate
  • 0.9 cup granulated sugar
  • 0.3 cup light brown sugar packed
  • 3 large eggs
  • 2 tsp vanilla extract
  • 0.25 cup Irish whiskey for the batter
  • 0.5 tsp instant espresso powder
  • 0.5 tsp kosher salt
  • 0.95 cup all-purpose flour
  • 0.35 cup unsweetened cocoa powder sift if lumpy
  • 0.5 cup chocolate chips semisweet or dark
  • 0.5 cup chopped walnuts optional
  • 1 cup powdered sugar for the glaze
  • 1 tbsp unsweetened cocoa powder for the glaze
  • 2 tbsp Irish whiskey for the glaze
  • 1.5 tbsp heavy cream plus more to thin, if needed

Instructions

Preparation Steps

  • Heat oven to 350°F. Line an 8-inch square pan with parchment and lightly grease.
  • Melt butter and chopped chocolate in a bowl over simmering water, stirring until smooth.
  • Set aside 3 minutes to cool slightly.
  • Whisk in granulated sugar and brown sugar until glossy and combined.
  • Beat in eggs one at a time until fully incorporated.
  • Stir in vanilla, whiskey, espresso powder, and salt.
  • Sift flour and cocoa over the bowl. Fold gently just until no dry streaks remain.
  • Fold in chocolate chips and walnuts, if using.
  • Spread batter into the pan and smooth the top.
  • Bake 28–32 minutes, until the center is set with moist crumbs on a tester.
  • Cool in the pan at least 30 minutes.
  • Whisk powdered sugar, cocoa, whiskey, and cream until smooth and pourable. Add a splash of cream if needed.
  • Pour or spread glaze over brownies. Let set 20 minutes, then slice and serve.

Notes

For a twist, add 1 tsp orange zest to the batter or swap the glaze whiskey with Irish cream. Serve slightly warm with vanilla ice cream, or dust with extra cocoa for a deeper chocolate note. Store covered at room temperature for up to 3 days or refrigerate for a fudgier bite.
This recipe is an original creation inspired by classic Irish Whiskey Brownies flavors. All ingredient ratios and instructions are independently developed.