Iced Monster Cookies

Ingredients

• 1 cup butter or margarine, softened
• 1 cup sugar
• 3 eggs
• 1 teaspoon vanilla
• 3 cups all-purpose flour
• 1/2 teaspoon baking soda
• 1/2 teaspoon baking powder
• 1/2 cup solid vegetable shortening
• 1/2 cup butter or margarine
• 1 teaspoon vanilla extract
• 4 cups sifted confectioners' sugar (approx. 1 lb)
• 2 tablespoons milk