01 -
Preheat oven to 350°F (175°C). Line a 9×13-inch pan with parchment paper and grease lightly.
02 -
In a large bowl, whisk together melted butter, sugar, eggs, and vanilla extract until smooth.
03 -
Sift in the flour, cocoa powder, salt, and baking powder. Mix until just combined (do not overmix).
04 -
Spread the batter evenly in the prepared pan and bake for 20-25 minutes, or until a toothpick inserted comes out with a few moist crumbs. Let brownies cool completely.
05 -
In a microwave-safe bowl, heat heavy cream until warm (but not boiling). Pour over chocolate chips and let sit for 1 minute, then stir until smooth.
06 -
Let the ganache cool slightly until thickened but still spreadable.
07 -
Once cooled, use a sharp knife or square cutter to slice the brownies into small 1-inch squares.
08 -
Spread a thin layer of ganache over half of the brownie squares, then top with another brownie square to make mini sandwiches. Refrigerate for 10 minutes to set.
09 -
In a bowl, whisk together powdered sugar, cocoa powder, milk, and vanilla until smooth. If the glaze is too thick, add a little more milk.
10 -
Place brownie stacks on a wire rack over a baking sheet. Pour the glaze over each one, ensuring full coverage. Let excess glaze drip off.
11 -
Refrigerate for 15-20 minutes until the glaze is firm.