Preheat the Oven to Gas Mark 4 ( 350 F). Grease the squares of the traybake.
Break the chocolates and add them to a Bowl along with Butter. Heat them for 30 seconds, stir and heat again for 30 seconds. Stir with a whisk ensuring they are melted and mixed well.
Add Sugar and whisk again. Add the eggs, baking powder and flour and mix until well combined.
Now carefully spoon the batter into the greased squares and bake for 12-15 minutes. Insert the toothpick to check if it comes out clean.
Remove from oven, allow them the Cake Squares to cool down. Serve the squares and enjoy.
Notes
If you are baking in a regular baking tin, line a parchment paper . Also, bake it for longer. Since i am making indivisual portions, baking time is a lot lesser.