Mochamallow Brownies

"My husband loves sweets so I made up these yummy brownies for him a few years ago.  Chocolate, Coffee and Marshmallows, what's not to love?"

Brownies:
3/4 cup butter
2 cups sugar
1-1/2 cups flour
1/2 cup cocoa powder
2 Tbsp. instant coffee granules
1/2 tsp. baking powder
1/4 tsp. salt
4 eggs
2 tsp. vanilla
1 cup miniature semi-sweet chocolate chips, divided
2 cups mini marshmallows

Preheat oven to 350 degrees.  Spray a 13x9 pan with non-stick cooking spray.  In a medium saucepan over medium-low heat, melt butter.  Remove from the heat and add sugar, flour, cocoa powder, instant coffee granules, baking powder, salt, eggs and vanilla.  Stir until well blended and smooth.  Stir in 1/2 cup of chocolate chips.  Spread in prepared pan.  Sprinkle with remaining 1/2 cup of chocolate chips.  Bake for 25 minutes.  Remove from the oven and sprinkle on marshmallows.  Return to the oven just until the marshmallows are slightly puffed, about 2 minutes.  Remove from the oven and drizzle Mocha Frosting (recipe follows) over hot brownies.  Cool completely before cutting.

Mocha Frosting:
1/4 cup butter
3 Tbsp. cocoa powder
1 Tbsp. instant coffee granules
2 cups powdered sugar
1 tsp. vanilla
1/4 cup milk

In a medium saucepan, melt butter.  Remove from the heat and add cocoa powder, coffee granules, powdered sugar, milk and vanilla.  Stir until smooth.  Pour over hot brownies.