Place the dry ingredients in a bowl and sift together or combine with a whisk.
Add the vegetable oil and milk and fold in with a spatula.
When the dough is crumbly, gather the dough and wrap with plastic wrap. (If it's too crumbly, add more milk.)
Roll out the dough, shape it into a log and cut it into 7 mm slices. Bake in an oven preheated to 170℃ for 14~15 minutes. Cool on a rack.
They are crumbly just after they come out of the oven, but will be crunchy when cooled.
Cocoa version: Recipe ID: 2234854.
Story Behind this Recipe
The cocoa version of this cookie is popular, so I made it with matcha.
You can combine and knead the ingredients in a plastic bag instead of the method described. You don't need to rest the dough, but if it crumbled when you try to slice it, add more milk. Adjust the baking time to your oven.