Preheat your oven to 180 ℃ and grease a cupcake tin with cooking spray

Combine flour, sugar, baking powder in a large bowl.

Add vanilla, eggs, oil and milk to the dry ingredients

Separate the mixture in two and add the cocoa to one half of the mixture.

Fill the cupcake tin with the vanilla mixture and then top it up with the chocolate mixture

Swirl the two mixtures together with a toothpick

Place in oven for 15- 20 minutes