Last. Soak in hot water, drain and add seasonings. Instant red oil dough usually consists of one noodle cake, one pack of chili oil, one pack of chopped green onions and salt, and one pack of balsamic vinegar. When eating, first put the noodle cake into a bowl, then add boiling hot water to soak it. The soaking process needs to be covered, usually 5 minutes is enough. After soaking, pour out the water, add chopped green onion, salt, balsamic vinegar, and finally add chili oil and stir, then the red oil dough is ready.