Peanut butter brownies

Ingredients:

Makes about 24
for the bars:
1/2 cup butter
1/2 cup unsweetened baking cocoa
4 large eggs
2 cups granulated sugar
1 cup all-purpose flour
1 teaspoon vanilla extract
1 cup peanuts, chopped
for the frosting:
4 tablespoons milk
1/3 cup chunky peanut butter
2 tablespoons butter
1-1/2 cups powdered sugar

Directions:

Preheat oven to 350 F. In a large saucepan, melt 1/2 cup butter. Stir in unsweetened
baking cocoa and cook over low heat. Remove from heat and add eggs; one at a time,
beating after each egg. Stir in sugar, flour, vanilla, and chopped peanuts, beating till
combined. Pour into a greased 13 x 9-inch baking pan. Bake for 25 minutes. Cool
completely before frosting.
Frosting: In a small saucepan, warm milk. Do not boil. Set aside. In a small bowl, blend
chunky peanut butter with 2 tablespoons butter; add powdered sugar and warm milk.
Slowly beat frosting until it reaches spreading