In a medium bowl, combine all the cookie ingredients: almond flour, coconut flour, salt, maple syrup, avocado oil, nut butter, and baking powder. Mix until a dough forms and set aside.
In a separate bowl, make the flax egg by combining 1 tbsp flaxseed meal and 3 tbsp water. Mix and rest for 10 minutes until it gels. Then add in the rest of the ingredients: nut butter, sugar, oil, vanilla, cocoa powder, coconut flour, baking soda, salt, and melted chocolate.
Roll out each dough separately. Cut the cookies out in circles using a cookie cutter or a cup. Then cut a hole in the center using a smaller circle, or another shape (I used a heart). Use this same smaller cutter to cut the brownie dough. Place the brownie dough in the hole of the cookies and repeat until all the cookies are cut out.
Bake at 350 degrees Fahrenheit for 10-15 minutes and enjoy!