Sweet Frog (stylised as sweetFrog - Premium Frozen Yogurt) is a chain of frozen yogurt retail stores owned and operated by Sweet Frog Enterprises, LLC. Sweet Frog customers create their own soft-serve frozen yogurt with numerous flavors and toppings from which to choose. Derek Cha, who immigrated to the United States from South Korea at the age of 12, is the founder of Sweet Frog.