the method of making glutinous rice paste with purple sweet potato and sweet potato is half steamed and peeled, and mixed with glutinous rice flour, butter and sugar to make dough. Sweet potato has a lot of water, so you don't need to add water. Purple potato is dry, so you need to add some water. It is advisable not to stick your hands. The remaining half of sweet potato and purple potato are mashed into mud and added with sugar. Like dumplings, purple sweet potato paste is put into sweet potato skin, and sweet potato paste is put into purple sweet potato skin and kneaded round. Steam in the pan for 1 minutes. Put them on the steaming plate separately from each other, and it's best to put oil paper on the bottom. Take it out while it's hot and roll it with coconut milk. This process will easily stick to your hands, and you can use tools such as spoons. Finished product! Eat!