For best results, use very cold mac and cheese to help the balls hold their shape. The double-dredge in panko creates an ultra-crispy shell. Freeze uncooked breaded bites on a tray, then transfer to a zip-top bag for frying straight from the freezer (add 1 extra minute). Reheat leftovers in the oven or air fryer at 375°F for 6–8 minutes to restore crunch. Do not freeze after frying. Feel free to customize with spices, dairy-free swaps, or mix-ins like jalapeños or pepperoni.