Purple sweet potato cake (doughnut version)

• 

  1.Preparation of water-oil dough: medium-gluten flour, white sugar, warm water, oil.Mix and soften into a dough
  Preparation of puff pastry: Mix low-gluten flour.purple sweet potato.oil.Mix into a dough, cover with plastic wrap and let rise for 10 minutes
  
  

• 

  2.Put the water and oil skin separately Divide the puff pastry into 6 equal portions, wrap the puff pastry with water and oil, and soften into glutinous rice balls for later use

• 

  3.Take a piece of dough and roll it into a tongue shape, roll it from top to bottom, cover it with plastic wrap and let it rise for 10 minutes

• 

  4. Roll the dough into a tongue shape again, roll it from top to bottom, cover it with plastic wrap and let it rise for 10 minutes

• 

  5.The fillings can be made according to your own preferences, I made crispy peanuts

• 

  6. Then cut the risen dough rolls evenly into 12 pieces Servings

• 

  7. Gently flatten the filling, wrap it and flatten it again , just like a big donut, bake in the oven at 200 degrees for 20 minutes