6 tablespoons unsalted butter, melted
1/4 cup sugar, plus more for the muffin tin
One 16-ounce tube refrigerated biscuit dough
1 small Granny Smith apple, peeled, cored and diced
8 individually wrapped caramel candies, unwrapped
If transporting to a tailgate or elsewhere, fill the muffin tin with the monkey bread, cover and keep cool in a cooler or refrigerator up to 6 hours before baking on the grill.