Add 1 cup milk powder, 1/2 cup cornflour, 1/4 cup sugar, and 1 tbsp vanilla powder (or 1 tsp vanilla extract, 1 tsp vanilla paste, seeds from 1 vanilla bean, or 1-2 tbsp vanilla sugar) to a large bowl. Whisk thoroughly until fully blended.

Funnel the powder into a clean, dry jar, tin, or resealable plastic bag. Press out excess air before sealing and store in a cool, dry spot.

And that's it - you now have homemade custard powder ready to transform into sweet vanilla custard whenever a craving strikes!