Preheat oven to 350°

Line a 8x8 pan with butter and parchment paper with an over hang

Simmer water in a pot

Put a bowl big enough to fit on the pot, but be sure that the water doesn't touch the bowl

Add butter and chocolate chips and stir til melted

Remove from heat and add both sugars. Stir till sugars dissolve

Add eggs and stir

Add flour and stir

Add brownie mix in pan

Bake 30 ~35 minutes until shiney top.

Add remaining chocolate chips from 12oz bag

Top with mini marshmallow

Add chopped nuts

Bake 5 more minutes

Cut into 16 pieces. May be sticky add vegetable oil to knife to help with cutting