Heat oven to 350 degrees
Melt the 1/2 cup cocoa butter pieces and 1/4 cup butter in a small sauce pan over low heat
Remove from heat and stir in honey
Add cashew butter, cocoa butter mixture, eggs, and vanilla to a large mixing bowl
Beat at medium speed until smooth
Add almond flour, coconut flour, baking soda, and salt
Beat at medium speed for a minute, until ingredients are mixed
Coursely chop cocoa butter pieces so they are not in big chunks
Stir in cocoa butter pieces and chopped walnuts
Lighly grease an 8 x 8 square or a 9" round cake pan with coconut oil
Pour batter into prepared cake pan
Bake for 20 - 25 minutes until blondies are set on top and toothpick inserted in the middle comes out clean
Cool completely on wire rack for about an hour before slicing
Store in refrigerator