Taco Bell is using the new year to refresh its menus, adding new food items and another twist on a fan-favorite drink.

Taco Bell's Bell Sauce has been a mainstay, now with five variants to choose from. But what exactly goes into the sauce?

I ordered a burrito, coffee, and potatoes at Wendy's, Taco Bell, Chick-fil-A, McDonald's, and Burger King to find the best ...