Preheat the oven to 430°F (220°C). Line the cake pan with parchment paper.

In a clean medium-size mixing bowl combine the remaining ingredients EXCEPT for the cocoa powder. Stir thoroughly to combine the wet ingredients. Pour the dry ingredients into the bowl of wet ingredients and fold the dry ingredients until you form a thick batter with same consistency as shown in the video.

Divide the batter into two parts. In one part, add the cocoa powder and fold into the batter until you have a smooth consistent mixture. Drop large spoonfuls of each batter into a cake pan or loaf pan alternating between the vanilla and chocolate batters. Then run a knife or fork through the batter to create a swirl. Place the pan on the middle rack in the oven and bake at 350°F (180°C) for 50-60 minutes or until an inserted toothpick is clean (free of batter and crumb) when removed.

Remove and allow the cake to cool then remove and keep covered to preserve moisture. Slice the loaf or cake into 12 equal pieces. To help retain moisture only slice the loaf or cake as portions are needed.