1Heat oven to 450°F. Spray 9-inch square pan with cooking spray. In medium bowl, stir Bisquick mix, water, onions and chili powder until soft dough forms.
2On surface generously sprinkled with Bisquick mix, gently roll dough in Bisquick mix to coat. Shape dough into ball; knead 10 times. Roll into 10x10-inch square. Cut 5 rows by 5 rows to make 25 (2-inch) squares.
3Wrap 1 dough square around 1 cheese cube; roll into ball. Place in pan. Repeat with remaining dough and cheese cubes, placing 5 balls in each row. Brush butter over top.
4Bake 10 to 12 minutes or until light golden brown. Cool 5 minutes. Serve warm.