Ingredients: 2 cakes, 2 purple potatoes, milk, eggs, condensed milk and black sesame seeds.

Specific practices:

1, the purple sweet potato is steamed and mashed, and appropriate amount of milk and condensed milk are added and mixed evenly for later use.

2. Take a hand-held cake, spread the prepared purple potato paste evenly on the hand-held cake, cover another hand-held cake, pinch the edge, and cut it into vertical strips with uniform width.

3. After the vertical bar is folded in half, pinch both ends and twist it into a twist.

4. Spread oiled paper on the baking tray, put in purple potato rolls, brush the surface with egg yolk liquid, sprinkle with appropriate amount of black sesame seeds, and put in the oven 180 degrees 15min.