In a large bowl, or stand mixer stir cake/brownie mix, melted butter, egg, vanilla and coffee until well combined.
From there, stir in walnuts pecans and chocolate chips.
Scoop cookie dough in dome shapes on a lined or greased baking sheet spaced about 2 inches apart.
Small 1oz scoop bakes about 8 minutes when convection is on.Large 2oz scoop bakes 10-12 minutes when convection is on.
Leave to cool on baking sheet and store in air tight container.
Notes
This recipe post tests Betty Crocker's Salted Caramel Brownie mix and Duncan Hines Devil's Food Chocolate Cake mix. Both batches came out great! Duncan Hines also makes a Chewy Fudge Brownie Mix and Dark Chocolate brownie mix that are perfect for this recipe!Here with the differences:
Betty Crocker's brownie mix was more of a sticky batter and Duncan Hines was a thicker fudgy dough. Duncan Hines was easier to work with.
The Betty Crocker batch spread much farther on the baking sheet when it was in the oven than Duncan Hines, but both came out soft and chewy.
Use whatever chocolate mix you have-the end result is delicious!