Brush the processed chestnuts with oil. Brush more oil on the wounds of chestnuts (this does count as spraying salt on the wounds). The purpose is to let the oil seep into the oven. The upper lower tubes preheat the 200 degree baking pan. Lay tin paper oil paper. Otherwise, it will be difficult to clean the chestnuts after baking. Put the chestnuts in the baking pan bake at 180 ℃ for 20 minutes. At this time, the convenient way to melt the rock sugar is to heat the rock sugar with water, mix the white granulated sugar with water, heat it with Water heating, Dissolve the white sugar completely in water, becoming sugar water. Bake chestnuts in the oven for about 25 minutes, then remove the baking tray.

Dip a brush with sugar water brush on the surface of chestnuts (flipping the chestnuts while brushing, paying particular attention to the cracks). Due to the size of chestnuts the temperature differences in each oven, the baking time provided in the formula is for reference only. When the roasting is almost done, you can first take out a chestnut taste it to see if it is fully cooked. If , extend the roasting time. Chestnuts must be completely roasted to taste good.