Melting Moments
["1/2 c. (1 stick) butter", "6 Tbsp. sugar", "1 egg yolk", "1 tsp. vanilla extract", "1 c. flour", "2 Tbsp. cornstarch", "1/4 tsp. salt", "3/4 tsp. baking powder", "rolled oats"]
["In bowl, cream butter and sugar.", "Beat in egg yolk and vanilla.", "Sift together flour, cornstarch, salt and baking powder; stir in butter-sugar mixture.", "Shape into marble-size balls and turn in rolled oats to coat.", "Arrange cookies on greased jelly roll pan and bake at 375\u00b0 for 10 to 12 minutes.", "Makes about 3 1/2 dozen cookies."]
["butter", "sugar", "egg yolk", "vanilla extract", "flour", "cornstarch", "salt", "baking powder", "rolled oats"]