Step 1

Heat oven to 350°F (325°F for dark or nonstick pan). Grease bottom of 8 or 9-inch square pan with shortening or cooking spray.

Step 2

Make brownie batter as directed on box. Stir in espresso coffee, walnuts and 1/3 cup of the chocolate chips. Spread in pan. Sprinkle with remaining 1/3 cup chocolate chips and the espresso beans.

Step 3

Bake as directed on box. Cool completely on cooling rack, about 1 1/2 hours. Cut into 4 rows by 4 rows. Store covered at room temperature.