Grandma Shirley swore her 3-ingredient secret would be the highlight of every barbecue. I didn’t believe her until I saw the entire tray disappear before my eyes.

of fudge sauce over the top and swirl lightly for a decorative finish.

Step 6: Freeze

Cover the dish tightly with plastic wrap or a lid and freeze for at least 4 hours, or overnight, until completely firm.

Step 7: Slice and Serve

Remove the dessert from the freezer and let it sit at room temperature for 5 to 10 minutes before slicing. For clean cuts, run continue reading …