Cookie Dough Cupcakes with Nutella Frosting - Cupcake Fanatic

Ingredients

• 3/4 cup melted butter
• 1 cup packed brown sugar
• 1/2 cup granulated white sugar
• 2 large eggs
• 1/2 tsp kosher salt
• 2 tsp vanilla extract
• 2 cups all purpose flour
• 1/2 tsp baking powder
• 1 1/2 cup dark chocolate chips
• 1/2 cup butter, softened
• 1 1/2 cups sugar
• 3 eggs
• 2 1/4 cups flour
• 1 teaspoon salt
• 3 1/2 teaspoons baking powder
• 1 1/4 cups milk
• 2 teaspoon vanilla
• 1/4 cup sour cream
• 1 cup butter, softened
• 1 1/2 cup icing sugar
• 1/2 cup bitter sweet chocolate