01 -
Preheat oven to 350°F (175°C). Line an 8×8-inch baking pan with parchment paper, leaving overhang for easy removal.
02 -
Combine butter and chocolate in a heatproof bowl over simmering water, stirring until melted and smooth. Alternately, microwave in 20-second intervals, stirring between each, until fully melted. Allow mixture to cool slightly.
03 -
Whisk granulated sugar into the melted chocolate mixture. Add eggs one at a time, whisking thoroughly after each addition.
04 -
Stir in vanilla extract and peppermint extract until evenly incorporated.
05 -
Sift all-purpose flour, unsweetened cocoa powder, and salt over the wet ingredients. Fold gently with a spatula until just combined. Do not overmix.
06 -
Pour batter into prepared pan and smooth the top. Bake for 25 to 30 minutes, or until a toothpick inserted into the center emerges with a few moist crumbs. Remove from oven and let cool completely in the pan.
07 -
Heat heavy cream in a small saucepan until just simmering. Pour over chopped chocolate and butter in a heatproof bowl. Allow to sit for 2 minutes, then stir until glossy and smooth. Mix in peppermint extract to taste.
08 -
Spread ganache evenly over cooled brownies. Garnish with chopped mint leaves and crushed mint candies if desired. Refrigerate brownies for at least 30 minutes to set the ganache before slicing.
09 -
Lift brownies out of the pan using parchment overhang, cut into squares with a hot, clean knife, and serve chilled or at room temperature.