Ingredients

• 3 eggs
• 1 cup superfine sugar
• 1/4 cup vegetable oil
• 1/4 cup sour cream
• 1 cup orange juice
• 2 cups all-purpose flour
• 2 1/2 teaspoons baking powder
• 4 tablespoons unsweetened cocoa powder, depending on the contrast you desire in your cake (you can add less (or more)
• 1 orange, zest of (optional)

Instructions

1. NOTE: My original recipe used less baking powder and I found that it didn't rise very much,so I increased the amount of baking powder.

2. In a medium bowl ,whisk the eggs with the sugar,sour cream,oil,and orange juice.Add orange zest at this point if using any.

3. In a separate bowl ,sift the flour and baking powder and gently mix together to evenly incorporate the baking powder into the flour.

4. Slowly add the egg mixture into the dry ingredients and mix until everything is combined.

5. Next, pour half of the batter into a separate bowl and add cocoa powder to it.If the cocoa mixture has a thicker consistency,then you can add a little bit of orange juice to thin it out.

6. Lightly grease a 9 inch round or square cake pan and pour the batter interchangeably to get a marble or swirl effect.This is where you can get creative.

7. Bake at 350 degrees F for 40 minutes or until tester comes out clean.