Steps
1. Preheat your oven to 350°F (175°C).
2. In a bowl, mix the flour, baking powder, and salt.
3. In a separate bowl, combine the cocoa powder and sugar.
4. In another bowl, whisk together the milk, vegetable oil, and vanilla extract.
5. Gradually add the dry ingredients to the wet ingredients until smooth.
6. Divide the batter into two parts, adding cocoa batter to one and vanilla batter to another.
7. In a greased ramekin, alternate pouring the batters to create a zebra pattern.
8. Bake for 15-18 minutes or until a toothpick comes out clean.
9. Let cool for a few minutes, then dust with powdered sugar before serving.