1. Purple sweet potato peeled and thinly sliced, steamed in a pot, about 20 minutes
2. Crush the purple sweet potato into puree
3. After the butter has softened at room temperature, add sugar and mix well
4. Add purple potato mash
5. Add formula or milk and mix well
6. Add low-gluten flour and stir
7. For decorating, choose the decorating mouth you like
8. Squeeze into the baking tray, preheat the oven to 160 degrees, middle level, bake up and down for 20 minutes
Tips:Formula milk is 15 grams of milk powder mixed with water
