Egg flavored sandwich biscuit
The first time I made cookies, I was very satisfied. It may take a short time to make purple potato sandwiches for shaping, so they didn't look as beautiful as expected. I also made them without care. When they were frozen for 10 minutes, they would be much better. Purple potato stuffing can be replaced by jam. I don't have any ready-made ones at home, so I made stuffing. This can be filled as you like.
Step 1 . Prepare the raw materials really well.
Step 2 . Mix flour and starch through a sieve.
Step 3 . Cut butter into small pieces and soften at room temperature.
Step 4 . Put butter into a bowl, stir with a spoon until soft, add granulated sugar and salt and stir evenly.
Step 5 . Add the egg yolk and continue stirring evenly.
Step 6 . Stir until all the white sugar is melted, and stir the mixture until it becomes smooth.
Step 7 . Divide the sifted flour into three portions and add them to the egg yolk mixture, stirring until a dough is formed.
Step 8 . After mixing the dough, knead it twice by hand to make a smooth dough.
Step 9 . Wrap the dough with plastic wrap and place it in the refrigerator compartment, let it relax for at least 1 hour.
Step 10 . Peel and cut purple sweet potatoes into pieces, steam until cooked.
Step 11 . Add a little milk to the purple sweet potatoes, stir with a spoon a spoonful of white sugar, and mash into a paste.
Step 12 . Take out the loose dough and divide it into two parts.
Step 13 . Take a portion of dough and roll it out with a rolling pin into a large pancake shape.
Step 14 . Spread purple sweet potato puree evenly on the cake.
Step 15 . Roll from one end to the other end.
Step 16 . Wrap the strip with plastic wrap, roll it on the cutting board, adjust the thickness of the dough roll, and place it in the freezer for 30 minutes.
Step 17 . Take out the frozen long strip and cut it into circles about one centimeter wide with a knife.
Step 18 . Put it into the preheated oven and bake at 170 degrees for 15 minutes.
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