-
Preheat oven to 350 degrees
-
In large bowl, cream together butter and sugar until light and fluffy. Add in eggs, one at a time, beating between each addition. Add in vanilla extract.
-
In a large bowl combine the flour, cocoa, espresso powder, baking soda, and salt.
-
Turn the mixer to the lowest speed and gradually add the flour mixture to the butter mixture until fully combined. Fold in the chocolate chips
-
Drop rounded teaspoonfuls onto cookie sheets and bake for 8-10 minutes until set.
-
Remove from the oven and immediately top warm cookies with several mini marshmallows.
-
Cool on wire racks.
-
Microwave cookies for 10 seconds before enjoying to ensure gooey marshmallow deliciousness!