Chocolate Mile High Marshmallow Squares

Ingredients:

• 1/2 cup butter
• 2 cups granulated sugar
• 4 eggs
• 1 1/2 cups all-purpose flour
• 1/2 teaspoon baking powder
• 1/2 teaspoon salt
• 2 teaspoons vanilla extract
• 1/3 cup unsweetened cocoa powder
• 2 cups miniature marshmallows
• 1 cup semisweet chocolate chips
• 1 1/2 cups chopped walnuts

Instructions:

1. Preheat oven to 350°F (175°C). ????????
2. Grease a 9×13 inch baking pan.
3. In a large mixing bowl, cream together the butter and sugar until light and fluffy.
4. Add the eggs, one at a time, beating well after each addition.
5. In a separate mixing bowl, combine the flour, baking powder, salt, and cocoa powder.
6. Gradually add the dry ingredients to the creamed mixture and mix well.
7. Fold in the marshmallows, chocolate chips, and walnuts.
8. Pour the batter into the prepared pan.
9. Bake for 25-30 minutes, or until a toothpick inserted in the center comes out clean.
10. Let cool completely in the pan on a wire rack.
11. Cut into squares and serve. ????????????