In a bowl, mix lemon fruit filling with 1 whisked egg.

Add cake mix and baking powder and stir well.

Grease a pan and pour the batter.

Cover the pan with foil.

Pour water into your Instant Pot and correctly place the trivet.

Put your pan onto the trivet and cook at high pressure for 40 minutes.

Let the steam release naturally, then wait for the cake to be completely cool before removing it from the pan.

Sprinkle your cake with powdered sugar and enjoy!