Cream butter and Castor sugar for about 4 minutes until fluffy and light and the color is pale yellow

Add egg yolks one at a time and mix after adding each

Add the lemon juice and mix( This is to get rid of egg smell in your cake

Sieve your flour, sodium bicarbonate and ground cinnamon in a separate bowl

Add the flour in bits alternating with milk until well incorporated.

Add vanilla Essence and mix

Add vinegar and mix

Beat egg whites in a separate bowl until they form soft peaks

Add the egg whites into the batter and mix. The batter should not be too light nor too thick

Pour your batter into a baking pan greased with oil and lined with parchment paper

Set your oven to 180 Degrees and preheat for 10 minutes

Put your baking tin with batter into the oven and bake for 40 Minutes. Refrain from opening the oven before then to ensure your cake does not sink

Check whether your cake is ready by inserting a skewer(read Knife) at the center of the cake. If it comes out clean, it is ready. if it comes out with batter or crumbs put back in the oven for another 10-15 minutes until ready