1. Soften the butter at room temperature, add sugar, mix well with salt, and beat until fluffy
2. Add egg whites and beat well
3. Add vanilla extract and mix well
4. Add the sifted low-gluten flour and mix well
5. Put the batter into a ball on the cling film and cover it with a layer of cling film. Use a rolling pin to roll out into 2 mm slices
6. Use a round mold with a diameter of about 2 cm (you can use a beverage bottle cap or a round wide mouth at the other end of the piping head) to press out a round shape on the dough
7. Use a smaller round mold with a diameter of about 1.8 cm to press an inner circular mark on the disc
8. Use the head of the chopsticks to poke 4 holes on the inside of the circle as button holes
9. Place the prepared biscuit embryos on the baking tray, preheat the oven to 160°, and heat the middle layer up and down for 10 minutes
![Seasonal Vegetable Patties [baby Food Supplement] recipe](https://img.simplechinesefood.com/02/024b910033009872aea33017c755a377.jpg)
