1
box (1 lb 2.4 oz) Betty Crocker� Original Supreme Premium brownie mix
1/4
cup water
1/4
cup vegetable oil
1
egg
2
teaspoons instant espresso coffee (dry)
1/3
cup chopped walnuts, if desired
2/3
cup semisweet chocolate chips (4 oz)
1/3
cup chocolate-covered coffee beans, if desired