Preparation: 50g of mashed purple potatoes, 100g of mashed yam, 100g of mashed potatoes, 20g of low-flour, 20g of milk powder

1, purple potatoes, yam and potatoes into a bowl and mix well

2, sieve into the milk powder and mix well

3, sieve into the low-flour in small batches and mix well without dripping

4, put it into the laminating bag

5, Baking tray lined with greaseproof paper, squeeze soft cookies, oven 140 degrees for 20 minutes

Store in a sealed jar at room temperature for 3 days