Spread peanuts in a glass plate, put them in the microwave for two minutes, turn them over and put them in the microwave for two minutes, and then put them in the microwave for one minute at a time until the peanuts are cooked. Mix starch with water, add sugar and pour into a wok. Boil the sugar juice with low heat and keep stirring. After soaking, pour in peanuts and continue stirring until the icing is dispersed. Pour it into the baking tray while it is hot and cool.