1Preheat your oven to 180°C (350°F) and grease a loaf pan.
In a large mixing bowl, sift together the maida, baking powder, and baking soda.
In another bowl, mix the sugar and oil until well combined.
Add the milk and vanilla extract to the sugar-oil mixture and mix well.
Gradually add the dry ingredients to the wet ingredients, mixing until just combined.
Divide the batter into two equal parts.
Melt the dairy milk chocolate and mix it into one part of the batter.
Pour alternating spoonfuls of the plain and chocolate batters into the prepared loaf pan to create a marble effect.
Use a knife or skewer to gently swirl the batters together for a marbled look.
Bake in the preheated oven for 35-40 minutes or until a toothpick inserted into the center comes out clean.
Allow the cake to cool in the pan for 10 minutes before transferring it to a wire rack to cool completely.
Slice and serve your delicious eggless marble cake.