I can't believe I ate the whole thing. McDonald's 100% Angus Third Pounder with Bacon and Cheese Burger: a third of a pound of juicy and flavorful Angus beef patty with a slice of cheese on the bottom and topped with mustard, ketchup, slices of crisp sweet red onion, pickles, 3 slices of crispy bacon, and another slice of cheese on a soft but sturdy 5-inch bun. Yummy!