There has been an explosion of frozen yogurt shops in the Milwaukee over the past year. While they offer different experiences in terms of atmosphere, in general, they tend to dish up similar flavors and toppings by the ounce. For our first froyo challenge, we focused on two East Side places: Yo Factory, 2203 N. Farwell Ave., and Berry Me, 1320 E. Brady St., each of which charges 45 cents an ounce.