Start by greasing your mixing bowl. This will stop it sticking when you make your sponge and easy for cleaning later.

In the mixing bowl add your butter and sugar and cream the fat into the sugar. Beat in the eggs (a little at a time) until it is well mixed. Add the milk, cocoa powder and vanilla and a little flour at a time until you’ve used half the flour. Mix well. Fold in the rest of your flour.

While it is sat still and everything has been done place squares of chocolate into the centre of the mixture as this will then become the melted chocolate centre and make it into a lava chocolate sponge pudding when cooked.

In your Instant Pot place your cup of water at the bottom, then your steaming rack, then your mixing bowl.

Place the lid on it and move the valve to sealing. Cook for 12 minutes on the steam function.

When done it will beep six times. When it does unseal the valve and once the steam has passed you can open it up and serve your chocolate pudding with fresh raspberries.