Begin by preheating your oven to 180°C/360°F. Grease and flour a 24cm cake mold, ensuring it’s ready for the batter.

In a large mixing bowl, crack open the eggs and beat them using a mixer until they become frothy and pale.

Gradually add the sugar to the beaten eggs, continuing to mix until the sugar is fully incorporated.

Grate the zest of half a lemon directly into the bowl, infusing the batter with a hint of citrusy freshness.

Pour in the water and sunflower oil, then mix everything together until smooth and well combined.

In a separate bowl, sift together the common flour and baking powder to ensure a light and airy texture in the cake.

Gradually add the flour mixture to the wet ingredients, stirring gently to avoid overmixing.

Continue mixing until all the flour is incorporated and no lumps remain, resulting in a smooth cake batter.

Once the batter is ready, it’s time to add the chocolatey goodness! Toss in the chocolate chips and fold them into the batter using a spatula until evenly distributed.

Now comes the fun part – dividing the batter into two halves. This is where we create the beautiful bicolor effect!

Take one half of the batter and transfer it to the prepared cake mold, spreading it evenly to cover the bottom.

To the remaining batter, add the cocoa powder and mix until it’s well incorporated, infusing it with rich chocolate flavor.

Carefully pour the cocoa-infused batter over the vanilla batter in the cake mold, creating distinct layers of flavor.

Place the cake mold in the preheated oven and bake at 180°C/360°F for approximately 45 minutes, or until a toothpick inserted into the center comes out clean.

Once baked, remove the cake from the oven and allow it to cool in the mold for a few minutes before transferring it to a wire rack to cool completely.

Once the cake has cooled, it’s time to slice into this delectable creation and savor every bite.

Serve the bicolor cake on its own or with a dollop of whipped cream and fresh berries for an extra touch of indulgence.

Get ready to impress your family and friends with this homemade masterpiece that’s as beautiful as it is delicious!