In a double boiler, combine the chocolate pieces and butter. Melt over low heat, stirring occasionally. Once melted, remove from the heat and set aside to cool slightly.

In a small bowl, combine the flour and baking powder.

In a medium bowl, whisk together the eggs, granulated sugar, salt, and vanilla extract. Whisk vigorously until the mixture lightens in color and thickens, about 1 minute.

Add the melted chocolate mixture to the egg mixture, whisking to combine.

Fold in the flour mixture using a rubber spatula.

Stir in the chocolate chunks or chips.

Spread the batter into the prepared pan and bake for 30-40 minutes or until a toothpick inserted in the center comes out clean.

Place the brownie pan on a wire cooling rack. Let cool completely in the pan.

Once cool, use the cookie cutter to cut out Mickey Mouse shaped brownies.

Place one to two scoops of ice cream in a bowl.

Add one Mickey shaped brownie.

Top with whipped cream, hot fudge, or any other desired toppings.