Ingredients
Method
- Preheat oven to 350°F and grease a mini muffin or donut hole pan well.
- Mix brownie batter according to box directions, adding vanilla; if too thick, stir in up to 2 tbsp milk.
- Spoon batter into pan, filling each cup about 3/4 full.
- Bake 10–12 minutes until set; cool 5 minutes then transfer to a rack.
- Whisk powdered sugar, coffee, and butter until smooth; dip warm donut holes or drizzle with a spoon.
- Let glaze set 10 minutes before serving.