Combine melted butter and brown sugar; spoon 1 tablespoon mixture into each muffin cup.
Mix granulated sugar and cinnamon in a zipper bag.
Separate dough into 20 biscuits; cut each biscuit into 6 pieces. Shake pieces in bag to coat. Place 10 pieces in each muffin cup.
Bake for 12-15 minutes or until golden brown.
Cool 1 minute; turn upside down. Serve warm.