Add the glutinous rice flour, corn starch, milk and sugar in a large bowl and mix well.
Pour it in a plate and steam for 20 minutes until cooked (use a chopstick to tie the middle if it is a little hard, it means cooked).
Transfer the cooked the glutinous rice paste in a bowl and add butter in it and stir evenly with a spatula.
Put a cup of glutinous rice flour in a non-stick pan and stir-fry it for about 5 minutes under a small heat until the glutinous rice flour is cooked to make a hand powder. (Hand powder can be applied to the glutinous rice paste to prevent sticking)
Put the hand powder on the cutting board. Apply a layer of hand powder on the palm of your hand, and then divide the glutinous rice paste into small balls by hand or mold.
Poke a hole in the glutinous rice ball, scoop about 1 tablespoon of ice-cream and some cookies powder in the hole. And make the wrapper completely wrap the filling into a ball. Make it into your favorite shape.
Spread a layer of hand powder on its surface. Serve.