In a medium saucepan over medium-low heat, melt ½ cup butter, ½ cup cream cheese, and ¾ cup sucanat.  Beat together well.

Add 2 eggs, cocoa powder, and 1 teaspoon of vanilla.  Beat again until well combined; add the coconut flour and mix again until smooth.  Add the walnuts and stir briefly.  Set aside.

In another saucepan, add ½ cup cream cheese, 1 egg, 1 teaspoon of vanilla.  Mix until smooth.

Grease an 8" round or 8x8 cake pan.  Pour 2/3 of the chocolate batter in, then the white batter, then the remaining chocolate batter.  Use a toothpick to swirl together.  Bake at 350ºF for 30 minutes or until a toothpick inserted comes out clean.