Ingredients:
Purple Yam (peeled) 200g
Sugar 40g
Butter 30g
Glutinous Rice Flour 100g

Instructions:

Cut the peeled purple yam into thick slices, steam for about 30 minutes, then remove and mash into a puree.
Mix all the ingredients together, and adjust the amount of glutinous rice flour according to the moisture content of the purple yam, until the dough is not sticky to the touch.
Divide the dough from step 2 into 6 equal parts, shape each into a round and flatten into a pancake shape. Fry over low heat until both sides are golden brown.