[method]
1. The muffin cake mix powder and chocolate powder are sieved for use.
2. Stir the material of Method 1 and the remaining material A into a batter.
3. Put the walnuts in the oven until they are scented, and chop them a little and mix them into the batter of Method 2.
4. Pour the batter of Method 3 into the Muffin cup and place in a preheated oven for about 30 minutes at 180 ° C/under fire at 160 ° C.