Preheat oven to 450°. In a small bowl, combine flour, sugar, baking powder and salt. Gradually add milk and stir to form a soft dough. Turn onto a floured surface, knead gently 3-4 times. Roll into a 10x5x1/2-in. rectangle; cut into 12 breadsticks. , Place butter in a 13x9-in. baking pan. Place breadsticks in butter and turn to coat. Sprinkle with sesame seeds. Bake until golden brown, 14-18 minutes. Serve warm.