Over the past year, self-serve frozen yogurt has eclipsed gelato as the cold treat of choice here in Phoenix. We love the tart varieties. We adore the abundance of toppings. But there's one yogurt in town that's like crack to our heat-addled brains, and that's Yogurtology's oatmeal cookie flavor. Sure, the cheesecake and red velvet varieties are tasty, but the Oatmeal Cookie makes every other flavor taste vanilla in comparison. Made with real oatmeal cookies and a host of other secret ingredients the owner won't reveal, it's rich and creamy with an earthy, sweet flavor that tastes exactly like the fresh-baked cookies Grandma made in our childhood. Forget the gummy bears and Oreos. This flavor doesn't need any dressing up to taste like a million bucks.