Prepare brownie batter according to box directions, but add vanilla extract and 1 teaspoon instant espresso powder dissolved in the wet ingredients. To do this, I generally just add it straight to the water before adding to the batter. Fold in mini chocolate chips.
Bake according to package directions.
When brownies are cooled, drizzle with slightly warm cookie icing.
While tacky, sprinkle with favorite sprinkles and allow to set before cutting.
If you've tried this recipe, let us know how it was!