Combine brownie mix, eggs, olive oil and flour. Take one tablespoon of dough and roll into a ball in your hand. Place about two inches apart on a baking sheet lined with parchment paper.
Bake for five minutes, then open the oven and add marshmallows on top of the cookies. Make sure they are stuck well, and bake for 2 to 3 minutes. Remove from oven and transfer to a cooling rack using a cookie spatula.
Sprinkle cocoa powder on top of cookies once they cool.
Notes
This Recipe Can be Doubled: This is a great recipe for a crowd. Simply increase the ingredients proportionately and bake following the directions. Great for a cookie exchange or Christmas party.
Add Flavors: Mix in peppermint, nuts, or chili powder for extra flavor.
Short cut tip: Sprinkle hot chocolate powder or drizzle caramel on the top of these cookies.
Variation tip: Use jet puffed mini marshmallows. They taste just like hot chocolate marshmallows.