Ingredients
Method
- Preheat oven to brownie box temperature; parchment-line baking sheet.
- Prepare brownie batter per box, stirring in melted butter, cocoa, espresso, and salt.
- Pour into greased shallow pan about 1/2-inch thick; bake 12–15 minutes until just set.
- Cool completely; cut 1/2–1 inch cubes.
- Toss cubes on baking sheet; bake 8–10 minutes at 300°F to crisp edges, flipping once.
- Cool; store airtight until serving.