Melanie's Chicken Biscuits Casserole

Ingredients (8)

• + 1 ½ teaspoons butter add to pantry
• + 4 cups chopped cooked chicken add to pantry
• + 1 cup sour cream add to pantry
• + ½ large onion, chopped add to pantry
• + 1 (10.75 ounce) can cream of chicken soup add to pantry
• ✓ ½ cup milk
• + ½ cup shredded Cheddar cheese add to pantry
• + 1 (10 ounce) package refrigerated biscuit dough add to pantry