Irene Jiang / Business Insider Adding Oreos to soft-serve ice cream is usually a recipe for magic. I tried the Oreo blended frozen desserts at McDonald’s, Burger King, Dairy Queen, Wendy’s, Chick-Fil-A, Shake Shack, and Checkers to see which was tastiest. I rated them on a scale of one to five, comparing their appearance, cookie-to-cream ratio, texture, and overall taste. McDonald’s […]