In 2-cup microwavable measuring cup, microwave 3/4 cup milk, 1/3 cup granulated sugar and 3 tablespoons butter uncovered on High 1 minute to warm milk. Pour milk mixture into large bowl. Beat in vinegar and eggs with electric mixer on medium speed. On low speed, gradually beat in flour blend mixture until combined. Beat on medium speed 2 minutes. In small bowl, stir together 1/4 cup granulated sugar and the cinnamon.