Walnut Frosty Cookies

2 cups flour
1/2 teaspoon baking soda
1/4 teaspoon salt
1 cup brown sugar
1/2 cup butter
1 egg
1 teaspoon vanilla

Topping:
1 cup chopped walnuts
1/2 cup brown sugar
1/4 cup sour cream

Sift together dry ingredients. Cream brown sugar and butter. Add egg and vanilla. Cream again.
Add dry ingredients. Mix till blended. Form into 1 inch balls, make a depression in center, place 2 inches apart on an ungreased cookie sheet.
Mix together topping ingredients. Place topping in depressions. Bake at 350F for 12-14 minutes.