In addition to the melted cheeses, the taco comes filled with a familiar combination of seasoned beef, shredded cheese, reduced fat sour cream, lettuce, and tomato.
During the test you can get the Midnight Melt Taco by itself for $1.99 or as part of a $5 Box combo that also includes a Beefy 5 Layer Burrito, crunchy taco, Cinnamon Twists, and a medium fountain drink.
Photo via Taco Bell.