About Sonso De Yuca Recipe : Sonso de yuca is a traditional Bolivian dish, especially in the Eastern region of Bolivia like Santa Cruz, Beni and Pando, the regions where cassava is highly cultivated. It is a popular street food in Santa cruz. Since cassava has a sweetish nutty flavor when cooked, sonso de yuca is often referred to as a sweet snack. It is usually served with a cup of coffee in the evening.