Restaurants Walnut Creek Yoppi Yogurt Closes in Ygnacio Plaza in Walnut Creek April 6, 2016 8:30 am Ygnacio Plaza, Walnut Creek The frozen yogurt shop Yoppi Yogurt closed recently in Ygnacio Plaza in Walnut Creek, next door to Yalla Mediterranean. Ygnacio Plaza Previous Post Wednesday Night Fever in Downtown Walnut Creek on April 6th Next Post Help Solve the Downtown Walnut Creek Flag Mystery