Mix together the sweet potato puree, apple sauce, egg, maple syrup, avocado oil and vanilla extract until smooth. In another bowl whisk together the flour, cocoa powder, baking soda, and salt. Fold the flour mixture into the wet ingredients until no dry spots remain. Fold in chocolate chips.
Line a muffin tin with 8 paper liners. Fill muffin liners ¾ full. Bake in the preheated oven for 20 minutes.