Preheat oven to 350F and line 2 baking sheets with parchment paper.
Beat olive oil, maple syrup, vanilla, and eggs in a stand mixer or with a hand mixer/whisk until combined.
Combine almond flour, coconut flour, cocoa powder, salt, baking soda and baking powder in a medium bowl.
Add dry ingredients to wet slowly, mixing on low speed until fully incorporated.
With a silicone spatula, fold in chocolate chips.
Using a spoon, scoop out cookies and place on parchment lined baking sheet.
Garnish with additional chocolate chunks and sea salt.
Bake for 10-12 minutes. Cookies will feel soft and slightly brownie-like.
Fill a piping bag with frosting + secure a flat icing tip.
To create little bug-eyed monsters, simply pipe frosting onto the back of the edible candy eyes and place 3-5 around the top of the cookie. Press gently to secure.
For the mummies, first place two candy eyes about ⅓ of the way down the cookie and secure in the same way you did for the bug-eyed monster cookies.
Next, pipe "gauze" onto the cookie. You'll make a crooked "X" on the top of the cookie, then begin layering the "gauze" in criss cross motions along the "body". See the image below for a close up on how I created the mummy cookie.