Kerupuk (Tapioca Crackers). consist of tapioca or palm flour flavored with everything from shrimp (udang) to fish, garlic, and soy beans. When raw, krupuk are like hard little shards of plastic. Drop them in hot oil and they instantly expand like some cheap magic trick into puffy coulds of perfectly agreeable crunchiness. Krupuk in various incarnations are usually left out in large bins at your table for eating with a meal.