What happens when you cross a McDonald's McMuffin with a burger? McDonald's Japan and Germany are about to find out by giving the beloved McMuffin a makeover, reports BurgerBusiness. McDonald's Japan is now offering a Mega McMuffin that offers double the sausage, bacon, cheese and a fried egg as part of the annual Big America All-Stars promo. In Germany, the sandwich is getting amped up with the addition of the Texas Burger, a three-piece bun with a single burger patty, two types of mustard, barbecue sauce, fried onions, bacon and cheese. Read more about it here.