01 -
Preheat oven to 165°C and line an 8-inch square baking pan with parchment paper. Lightly butter the sides for clean removal.
02 -
Melt the salted butter until smooth, then stir in the light brown sugar until glossy. Beat in eggs one at a time, then add the peppermint extract.
03 -
In a separate bowl, combine flour, cocoa powder, espresso powder (if using), cornstarch, and baking powder. Fold into wet mixture just until no flour streaks remain.
04 -
Fold in chocolate chips or chunks, reserving a few to scatter on top before baking.
05 -
Spoon batter into the prepared pan, smooth the top with a spatula. Bake for about 30 minutes, until a toothpick inserted in center comes out with a few moist crumbs attached.
06 -
Allow brownies to cool completely in the pan before frosting.
07 -
Mix melted butter, cocoa powder, sifted powdered sugar, and milk until smooth and creamy. Add additional milk if needed for desired consistency.
08 -
Spread frosting over cooled brownies and sprinkle with crushed peppermint candy.