Stir cashew butter in mixing bowl till creamy.
Add in egg, stir, then add in maple syrup and vanilla extract and mix well.
Slowly stir in cocoa powder.
Mix in salt & baking soda.
Fold in chocolate chips.
Line muffin tin with 12 silicone liners.
Fill each cup 3/4 full.
Bake at 325 degrees for 35 minutes.
Remove from oven and let cool completely before removing from liners.
Store in airtight container.