I don't think there is an oven for cooking with milk powder:

The simplest snack made with milk powder is coconut milk cube.

The method is as follows: firstly, brew the milk powder with boiling water, then add a proper amount of coconut milk, sugar and condensed milk for stirring. You need to use coconut milk as the bottom, pour in the stirred milk powder, sprinkle a layer of coconut milk powder on it, and freeze it in the freezer for three hours.