Combine the rice flour, kinako, and sugar in a plastic bag, and mix well. Add the vegetable oil, and massage the contents of the bag until evenly incorporated.
Gradually add milk a little at a time.
Roll the dough into small balls and arrange on a baking tray lined with parchment paper.
Bake for about 20 minutes in an oven preheated to 180℃, then place the baking tray on a cooling rack to cool.
Put the powdered sugar on a tray and roll the cookies in the sugar while they're still hot.
Story Behind this Recipe
I came up with this recipe to use up a huge supply of kinako.
＊ Add a small amount of milk if the dough doesn't come together. ＊ If using a small oven, bake in two batches. ＊ Use the type of powdered sugar that doesn't melt. ＊ I slightly increased the amount of cookies and baking time.