1. Put the softened butter in a large bowl, add icing sugar, and beat with a whisk until light yellow
2. Add the egg liquid several times in small amounts, wait until it is completely mixed, and then add it again until it is completely mixed
3. Add peanut butter and beat until fully mixed and uniform
4. Sift low-gluten flour and baking soda into a bowl, mix well with a spatula
5. Cover tightly with a layer of plastic wrap and refrigerate for half an hour
6. Knead into small balls of equal size with your hands and put them in the baking pan
7. Press it into a pie with a fork, put it in the preheated oven, bake at 175 degrees for 15 minutes, and the peanut butter cookies are ready
