Pinkberry

Every recipe I found online claiming to duplicate the tart frozen fat-free yogurt popularized by this 250-unit California-based chain—including one designed by chefs at Food Network Magazine—calls for Greek yogurt as the main ingredient when there is no Greek yogurt in the real thing. Plain fat-free yogurt is mentioned in the ingredients statement, and a worker at the store confirmed this fact. 

The tartness in the yogurt comes from citric acid, sometimes called "sour salt," which you can find in many grocery stores or online. For my original Pinkberry Frozen Yogurt copycat recipe, you'll add the hydrocolloid found in the real thing (a gel that simulates fat) by using fat-free half-and-half, which contains natural vegetable gums to create a smooth mouthfeel and a less icy texture.

Mix these six ingredients, pour the mixture into an ice cream maker, and in about 20 minutes, you'll have five cups of tart soft-serve frozen yogurt that tastes just like the famous original.    

Try more of my famous dessert copycat recipes here.

Source: Top Secret Restaurant Step-By-Step by Todd Wilbur.