1In 2-quart saucepan, stir sugar, butter, milk, vanilla and egg yolks until well mixed. Cook over medium heat about 12 minutes, stirring frequently, until thick and bubbly.
2Stir in coconut and pecans. Cool about 30 minutes, beating occasionally with spoon, until spreadable. Fills and frosts top of an 8- or 9-inch two- or three-layer cake.