Step 1: Prepare the Oven and the pan The oven needs to be Preheated at 180°C (160°C fan) / 350°F. Greasing and lining a rectangular baking pan which is approximately 30 x 23cm wide with baking paper is necessary, as it ensures your moist lemon drizzle tray bake comes out of the pan easily.
Step 2: Make the Batter Sponge. Mix the sugar and butter together until light in colour which creates pockets of air, rising your cake perfectly. Then add the eggs one by one, mix well after adding each egg. Carefully start folding in the self raising flour with a spatula that helps in keeping the air pockets in the batter. Add the zest of lemons and milk until a smooth batter is made.
Step 3: Baking the Sponge. Pour the batter into the baking pan, and smooth out the top. Bake for 25-30 minutes or until golden or when the knife comes out clean. If the sponge feels like a fluffy cloud when touched, then the cake is ready.
Step 4: Prepare the Drizzle. While the cake batter is in the oven, start preparing the top drizzle. Add fresh lemon juice in a bowl along with icing sugar and mix well. It must turn into a syrup, which is easy to pour on the cake. You can adjust the sugar according to your taste.
Step 5: Warm Drizzle on Top. Take the cake out of the oven and prick it with a fork on the top. Pour the zesty syrup on the fluffy golden cake evenly, until it soaks up all the syrup. The secret to the moister of the classic lemon drizzle traybake is this zesty sugary syrup.
Step 6: Let it Cool before Slicing. Let the cake cool down to room temperature in the baking pan for at least 15 minutes before it is transferred on a plate. The cake is traditionally cut into squares for serving but you can cut it however you like.