Inspired by the latest, limited-time release from Whataburger, we crafted our own sweet and creamy Dr. Pepper Shake to enjoy anytime.
Pour Dr. Pepper into a small saucepan over medium-high. Bring to a boil, and simmer until reduced to 1/4 cup, about 20 minutes.
Let cool completely, about 15 minutes, stirring occasionally. Process ice cream and reduced Dr. Pepper in a blender until frothy, about 30 seconds.