Add 1/2 cup of chopped bittersweet chocolate to the brownie batter before baking.
If a recipe yields more mini cupcakes than your pan will make, cover and refrigerate the rest of the batter while baking the first batch. Cool the pan 10 to 15 minutes and then bake the rest of the batter, adding about 1 minute to the bake time.
Simplify brownies by baking in a 13x9-inch pan. Cut into small squares and serve in mini paper or foil baking cups.