Fast-food chains, from Popeyes to Subway, have been turning up the heat. Now McDonald’s is spicing up its breakfast menu.

McDonald’s is turning up the heat on breakfast this summer with the new Spicy McMuffin and its spicy sausage variations.

McDonald's brings back the beloved Snack Wrap this week, but it's also tweaking the breakfast menu with new limited-time Spicy McMuffin sandwiches. Why it matters: Low- and middle-income consumers have been increasingly shying away from fast-food restaurants like McDonald's,