Stir together all of the ingredients for the shortbread cookies in a mixing bowl until well combined and a thick, sticky dough forms. Use your hands to form a cylinder out of the cookie dough and wrap in plastic wrap. Refrigerate at least two hours, until dough hardens.

Preheat the oven to 350 degrees F and lightly spray a large baking sheet with cooking oil. Remove the plastic wrap from the shortbread dough and place on a cutting board. Use a sharp knife to cut dough into 1/4-inch to 1/2-inch thick rounds. Place dough rounds on the prepared baking sheet and bake 12 to 15 minutes, until cookies are golden-brown around the edges.

Remove cookies from the oven and allow them to sit untouched at least 15 minutes - this process ensures the cookies will set up and hold together (If you don't allow cookies to cool, they will fall apart).

While cookies are cooling, prepare the chocolate coating (use either recipe depending on your dietary restrictions). Add the ingredients for the chocolate coating to a small skillet and heat to medium, stirring frequently, until chocolate chips have melted completely. (Note: if you choose to prepare the paleo chocolate coating, allow the mixture to cool 5 to 10 minutes, stirring every couple minutes, until mixture thickens.). Use a spoon to drizzle chocolate over 1/2 the surface of each cookie. Place bake on the cookie sheet until chocolate has hardened. Enjoy!