I was inspired by a candy called "Kinako Milk" which I saw at the supermarket.

Add as much condensed milk as you like.
Just one teaspoon gives a subtle sweetness and allows enjoyment of the kinako flavor.
If increasing the amount of condensed milk, it may be best to slightly reduce the amount of milk (since milk tends to give a pastier taste to the kinako and other ingredients). Recipe by Onigiri mama