|Melt 1 cup butter over medium-high heat in heavy 2-quart saucepan. Continue cooking, watching closely, until butter foams and just turns a delicate golden color (3 to 5 minutes). Immediately remove from heat; refrigerate 30 minutes.|
Heat oven to 350°F. Combine browned butter, sugar, egg and vanilla in large bowl. Beat at medium speed until well mixed. Continue beating, gradually adding flour, until well mixed.
Roll dough into 1-inch balls. Roll balls in decorator sugars. Place 2 inches apart onto ungreased cookie sheets. Flatten with tines of fork.
Bake 12 to 15 minutes or until lightly golden brown. Let stand 1 minute; remove from cookie sheets. Cool completely.