Lay out 4-5 sheets of tin foil (approx 12-15" long) & spray with cooking spray.
Cut each uncooked refrigerator biscuit into quarters & place in a gallon-size zip-top bag.
Add the granulated sugar, brown sugar, cinnamon, and cappuccino mix in the bag with the dough. Zip the bag & toss to coat.
Sift out the coated pieces of dough & place on prepared foil. (the portions will seem small - but the dough with puff & rise)
Sprinkle a little of the remaining coating mixture over the top & add a few cubes of butter to each foil pack.
Fold the ends of the foil together on one end & then fold in the other ends to seal tight.
Cook on a grate over hot coals for 20-25 minutes or until the dough is cooked through - turning every 5 minutes or so.
While you wait - prepare the glaze by whisking all the ingredients together in a small bowl.
Drizzle the glaze over the cooked monkey bread when serving.