I can't remember Burger King's recipe exactly. It's been a good 10+ years since I worked there, but here's my rendition. There's no angel food cake in the smoothie. It should probably be renamed Strawberry Banana, but that would be boring. Ample ice and a little water is necessary for the proper smoothie consistency. And if your smoothie burps a bubble at the end of the blend, you'll know it's perfect.