1. Add rye flour and cocoa nibs into a blender. Blend on high speed for 45 seconds until ground. Add coconut sugar, shredded coconut, flax, cocoa powder and salt. Blend again for 20 seconds.
2. Heat coconut oil, milk, almond butter and maple syrup in the microwave or over the stove in a pan until very warm. Stir well and pour the wet mixture into the blender with the dry ingredients. Blend another minute until a smooth cookie dough forms.
3. Lay 2 pieces of clingwrap out and scrape 1/2 the dough onto each piece of clingwrap. Shape and squeeze the dough firmly to make 2 round logs – each about 2 inches (5cm) wide and 12 inches (30cm) long. Wrap dough logs in clingwrap, freeze 30 minutes.
4. Preheat oven to 350ºF/180ºC and liberally coat 2 cookie sheets with oil. These cookies can stick, so use a little more oil than usual. Slice chilled dough into ½ inch (12mm) cookie rounds (48 cookies total). Bake 10 minutes or until lightly browned. Remove from oven, place in the freezer for 30 minutes.
5. Remove cookies from freezer and spread frosting onto half the cookies, top each one with another half to form a sandwich. Place back in freezer 10 minutes.
6. Chocolate: Combine chocolate and coconut oil in a microwave safe bowl and microwave for 60 to 90 seconds. Remove and stir to combine into a glossy, smooth chocolate coating.
7. Hold a cookie in your hand and dip halfway into melted chocolate. Sprinkle a little salt onto the chocolate to stick. Serve cookies cool to keep frosting stiff.