Preheat the oven to Gas Mark 6 or 5. Place 200g of diced butter into your Kenwood Attachment Food Mixer Bowl and then add the 200g Caster Sugar and then crack 4 medium to large hen eggs into that bowl and then add the 200g Self-raising Flour and the One teaspoon of Baking Powder - add the 2 tablespoons of Pasteurized Cow Milk and then eventually blend on full speed

Cut or tear Baking Parchment Paper too size and then scrunch it up with the palm of your Hands and then place it into the shallow Baking Tin and then place half of the homemade Cake Batter (about 2 heaped medium Ladles) into the lined shallow Baking Tin and bake at Gas Mark 5 for at least 20 minutes and then put a thin skewer or thin sharp Kitchen knife into the Sponge Cake to see if it is done - if not give a further 10 minutes in the oven

Once both are done and cooled down. Place diced Unsalted Butter into your Kenwood Attachment Mixing Bowl and then use your Kenwood Cake Blender Attachment too blend the butter into a very thick Cream mixture and then add the 140g of Icing Sugar too the blended 100g of butter and then keep turning on the minimum speed - use Plastic Spatula too bring creamed butter too the middle and then add a little drop of Vanilla Extract if you are using and then briefly blend on full speed