In a medium bowl, mix the almond flour, arrowroot powder and salt.
In a saucepan, melt the butter over medium heat.
Whisk in the vanilla extract and honey with melted butter.
Combine wet and dry ingredients and mix gently with rubber spatula to form the dough.
Roll dough between 2 sheets of parchment paper with a rolling pin to about ⅛ inch thickness. Be sure the thickness is even throughout so all your cookies bake and look the same.
Cut dough into cookies using a 2-inch cookie cutter and arrange cookies on a baking sheet lined with parchment paper. Re-roll the remaining dough and continue cutting until all is used.
Bake for 5 to 8 minutes or until the edges are lightly golden. Let cookies cool on wire rack.
Melt the cacao butter in a bowl over simmering water (double boiler). After melted remove from heat and stir in the cacao powder, almond butter, honey and vanilla until combined.
To form the sandwich cookies, flip half the cookies on the rack and add about 1 teaspoon of the chocolate, then top with remaining cookies bottom-sides down and gently squeeze together. Drizzle top with melted chocolate.
Almond butter: Be sure to stir the contents in the jar before measuring (an immersion blender is great for this)!Vanilla extract: substitute vanilla bean powder so your cookies shine with bright vanilla flavor.Cacao butter: The most accurate way to measure the amount you need is by weight using a kitchen scale.Dough: The dough is very soft and delicate to work with especially if it's rolled very thin. This can make it hard to transfer the cookies onto the baking sheet so use the help of a dough scraper or putty knife. Watch the recipe video to see how I do it. Alternatively, you can refrigerate the dough to make it easier to handle.Chocolate drizzle: Give your cookies a beautiful finish with a drizzle of melted chocolate on top or dip half of the cookies in melted chocolate.Storing: Store cookies in an airtight container either at room temperature, or in the fridge or freezer.This recipe makes about 15 to 20 2-inch cookies depending how thin you roll your dough.