Margaret
1.
Boil the egg and soak in cold water to take the egg yolk for later use
2.
Beat butter and icing sugar until white and fine.
3.
Add boiled egg yolk and beat until the volume expands, then add salt and stir well.
4.
Add the sifted flour and mix well.
5.
Divide the dough into 15 grams and knead it into a shape. Use your thumb to gently crush until it cracks naturally.
6.
Bake in the oven at 170 degrees for about 17 minutes, the surface is slightly yellow and the mouth is loose and crisp
7.
Decorate and serve
Tips:
Baking: middle and upper layer of the oven, the upper and lower fire is 170 degrees, 15-20 minutes