Mix egg and sugar with a whisk in a bowl until it becomes white.
Add milk and vegetable oil little by little. Mix flour and baking powder and sift together. Add it and mix with a spatula until barelycombined.
Pour it into the pots. You can add raisin, chocolate chips, steamed sweet potatoes, etc... If desired.
Fill the base of the appliance with water up to the max level. Plug in the appliance; click twice on OK to select the dairy dessert mode then click on OK to confirm your choice. Adjust the cooking time to 25 or 35 min using the keys then confirm your choice by clicking on OK.
When cooking is complete, leave to cool, put the lids on the pots and refrigerate.