Malted Milk Cookies

2 cups packed brown sugar
1 cup butter or margarine softened
1/3 cup sour cream
2 teaspoons vanilla
2 eggs
4 3/4 cups all-purpose flour
3/4 cup natural-flavor malted milk powder
2 teaspoons baking powder
1/2 teaspoon baking soda
1/2 teaspoon salt
Malted Milk Frosting (recipe follows)
Malted Milk Frosting
3 cups powdered sugar
1/2 cup natural-flavor malted milk powder
1/3 cup butter or margarine softened
3 tablespoons milk (3 to 4 tablespoons)
1 1/2 teaspoons vanilla
Heat oven to 375. Beat brown sugar, butter, sour cream, vanilla and eggs in large bowl with electric mixer on medium speed, or mix with spoon.
Stir in remaining ingredients except
Malted Milk Frosting.
Roll one-third of dough at a time 1/4 inch thick on lightly floured surface. Cut into 2 1/2-inch rounds.
Place about 2 inches apart on ungreased cookie sheet. Bake 10 to 11 minutes or until almost no indentation remains when touched in center. Immediately remove from cookie sheet to wire rack. Cool completely. Frost with Malted Milk Frosting.
Malted Milk Frosting:
Mix all ingredients until smooth and spreadable.