1. Preparation materials
2. Put the cooked purple sweet potato, butter, and powdered sugar together and beat with a whisk until evenly white, then add the egg liquid
3. Continue to beat until whitish
4. Sift into low-gluten flour
5. Grab and mix evenly
6. Pack it in a bag and put it in the refrigerator for more than 1 hour
7. Take out the dough and divide it into small doses
8. Press the dough slightly and press the mark with a fork
9. Oven 180 degrees, bake for about 30 minutes
10. Let cool and ready to eat
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