1. Weigh all materials
2. High-gluten flour, whole wheat flour, dry yeast, salt, milk powder, whole egg liquid, water, and corn oil are put in a basin and mixed evenly, knead until smooth and add softened butter
3. Continue to knead until you can pull out a large piece of film
4. Put it in the basin and cover with plastic wrap
5. Put it in a warm place and ferment to double the size
6. Exhaust and knead, evenly divide into 16 portions, cover with plastic wrap, and let stand and relax for 15 minutes
7. Sweet potatoes are steamed and crushed into mashed sweet potatoes
8. Take a loose dough, roll it out into a rectangle, and smear it with mashed sweet potatoes
9. Roll up from top to bottom
10. Place in the baking tray
11. Put it in a warm and humid place to ferment to double its size, and brush with a layer of whole egg liquid
12. Put it in the preheated oven, middle level, upper and lower heat, 150 degrees, about 20 minutes
13. Kind of brushed
14. If the red sweet potato is more beautiful!
