Preheat your oven to 350F / 175C. Then take out your 8" bundt pan (see directions for other types of cake pans above), brush every surface with a little oil, and then dust it with flour.

Put the vegetable oil, 3/4 cup of non-dairy milk, vanilla extract, sugar, baking powder, salt and orange juice into a large bowl. Mix until well combined.

Add flour and stir until incorporated.

Divide your cake batter into two bowls. Add cacao powder and 1tbsp of non-dairy milk to one half. Stir to combine.

Add orange zest to the other half and stir to combine.

Pour a little bit of your chocolate mixture into the pre-prepared bundt pan, followed by a little of the orange mixture. Repeat this step until you have no more cake batter left in your bowls.

Bake the cake for 45-50 minutes, until a toothpick can be inserted and come out clean. Let the cake cool before taking it out of the bundt pan.

Optional: sprinkle powdered sugar on top of the cake before serving.