Tray Bake Tin 29 cm x 19 cm oblong tin or similar. At least 2cm/1ins deep.
For the Tray Bake
4medium eggslightly beaten
200gSelf Raising floursieved
200gwhite chocolate roughly chopped
100gchocolate toppings such as maltersers and smarties
Prevent your screen from going dark
Make the Cake
Preheat the oven to 170deg fan assisted. Grease and line the base of a shallow 29cm x 19 cm oblong tin or similar, at least 2cm/1ins deep, with baking parchment.
Using an electric hand mixer, beat together the butter and sugar until light and fluffy. Add the beaten eggs a little at a time, adding a little flour to help prevent curdling. Mix until well combined. If needed, scrape down the sides of the bowl as you go along.
Add the Vanilla Extract and remaining flour. Mix together until well combined.
Pour the cake mixture evenly into the prepared tin. Bake for 25 -30 mins in the centre of the oven or until baked. Testing the centre of the cake, in different areas, with a skewer until it comes out clean.
Leave the cake in the tin to cool a little before turning it out onto a wire wrack to cool completely. The sponge may have risen a little, but don't worry it will settle down a little when cooled.
Make the White Chocolate Topping
Melt the chocolate in a heat proof bowl over a pan of simmering water. Stir frequently until melted and smooth. Leave to one side to cool a little and thicken but not set.
Once the traybake has cooled completely, pour the chocolate over the top of the cake. If you return the cake to the baking tin before you add the chocolate, this will help prevent the chocolate from dripping over the sides of your cake.
Before the chocolate sets firmly, decorate with candy such as Smarties or Maltesers, or whatever you happen to have in your cupboards.
To help prevent the chocolate from breaking when you cut into it, score the topping into individual sections to make it easier to slice when ready to eat. If you forget to do this, use a knife dipped in hot water, then wiped dry, to help soften the chocolate as you slice through it.