Preheat oven to 350°F or 180°C. Spray an 8 by 8 inch square pan with non stick cooking spray or grease it with butter and lay the bottom with parchment paper. Set aside.

In a large bowl cream together the sugar and butter until fluffy, and the color change into a bit pale. Add the egg, and vanilla essence. Beat until all combined.

Add the melted chocolate and whisk.

Add the dry ingredients and mix everything together until it’s incorporated but don’t over mix them.

In the other bowl, do the same method for the green tea batter

After all of the batters have been prepared, pour the cadbury batter into the prepared pan first (save 1/4 of the batter for the third layer), and next followed by the green tea batter on the top of the chocolate batter. Scoop the rest of the chocolate batter using a spoon and put them in a row above the green tea batter.

Swirl them to make the marble pattern using a bread knife

Bake for about 40 to 45 minutes or until when a toothpick inserted in the middle comes out with moist crumbs but not wet batter.

Cool for about 5 minutes in the pan and then transfer them to a cooling rack to cool completely. Cut into bars and serve.