1. After the butter is softened, add egg yolk (divided into two parts: one part for whipping, the other part for brushing the surface), sugar, salt, and milk powder, whipping evenly until smooth
2. No need to stir completely
3. Add the sifted low powder and yeast powder, and mix evenly.
4. Add the chopped chocolate and stir evenly.
5. The whole shape is round, 1.5cm thick, and cut into pieces. Because the material is very wet, if the glued board can be sprinkled with a little low powder, try to shape it.
6. In the middle level, heat up and down at 175 degrees for 15 minutes.
7. Crispy on the outside and tender on the inside. The 100% dark chocolate is a bit bitter. Add some sugar next time.
Tips:1. After mixing, the fabric is very wet and sticky, you can sprinkle some low powder, not too much. 2. The temperature is adjusted according to the difference of the oven.
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