Step 1

Preheat your oven to 170 degrees and line a 20cm square cake tin with baking paper, making sure to leave plenty of paper hanging over the sides.

Step 2

Separate your eggs and place the egg whites into a CLEAN and DRY bowl - this is very important and beat using an electric mixer until stiff peaks form. Set the egg whites aside until needed.

Step 3

Place the egg yolks and caster sugar together in a large bowl and use an electric mixer to beat until they have combined and are light and frothy.

Step 4

With the electric mixer still going on a low speed, gradually add the melted butter and vanilla extract before adding the sifted flour a few spoonfuls at a time.

Step 5

Gradually add the lukewarm milk and continue to beat on a low- medium speed to combine all of the ingredients.

Step 6

Add the egg whites to the bowl and gently fold together the mixture.

Step 7

Pour the batter into your prepared cake tin and place into your preheated oven and cook for 35 minutes or until a golden crust has formed on top of your cake.