Hot Cocoa Cookies with Marshmallow Buttercream - Dinner Bell Creamery

Ingredients

• 1 cup salted butter
• 1 1/4 cups white sugar
• 1/2 cup brown sugar
• 1 egg plus 2 egg yolks
• 1 Tbs. vanilla
• 2 cups all purpose flour
• 1/2 cup cocoa
• 1/4 cup hot chocolate mix
• 1 1/2 tsp baking powder
• 1 1/2 tsp baking soda
• 1 tsp salt
• 1 cup dark chocolate chips
• 1 cup semisweet chocolate chips
• 3 cups powdered sugar
• 2 tsp vanilla
• 1 tub of marshmallow cream (7 ounce tub)
• 1 tsp whipping cream