Preheat oven 325 degrees F and line a baking sheet
In a large bowl, add your egg, maple syrup, avocado oil, almond butter and vanilla and whisk well.
Add your almond flour, baking soda and salt and fold into your wet ingredients until combined with no almond flour lumps.
Add your chopped chocolate, marshmallows and chopped walnuts and combine with a spatula.
Using a medium sized cookie scoop, place each scoop on a baking sheet least one inch apart and slightly flatten the top of the cookie. Bake for 10 to 12 minutes, or until edges are set and slightly brown on top. Let cool on baking sheet 5 minutes then transfer to cooling rack to cool completely--or eat warm!