McDonald's said Tuesday that it is doubling down on breakfast by introducing bagel sandwiches nationwide to celebrate the Egg McMuffin's 50th anniversary. Why it matters: Breakfast is big business for fast-food chains and expanding menus can boost morning sales.

McDonald’s is bringing back the hugely popular Steak, Egg, and Cheese Bagel across the U.S., starting today. Find out why people are so excited about this breakfast sandwich and how you can get one.

Would you like fries with that? How about a donut — or a bagel? Krispy Kreme landed at McDonald’s locations in New York City starting Tuesday, Feb. 25, with participating locations adding the popular brand’s donuts to their menus.