Preheat the oven to 320F (160C).
Line a baking sheet with parchment paper.
Mix the almond flour, almond butter, maple syrup, vanilla, and orange zest in a small bowl and make a soft dough.
Divide the dough into 14 equal-sized pieces. Roll each piece into a small cylinder with tapered ends, and then shape into a crescent shape (note: the dough can be a bit crumbly and can crack a bit - make sure to warm it up well between your hands before giving it the crescent shape - see note 1). Arrange the cookies on the baking sheet. They won't spread in the oven, so don't worry about keeping too much distance between them.
Bake the cookies for 10-12 minutes or until the edges are beginning to turn golden. The cookies themselves will still be quite pale in color (see note 2).
Remove from the oven and let the cookies cool for about 5 minutes. While the cookies are still warm, place 4-5 tablespoons of powdered sugar and vanilla powder in a small bowl and mix well. Roll each cookie into the vanilla sugar until coated.
Once the cookies are completely cooled, you can store them in an airtight container at room temperature for up to a week. You can also freeze them for up to a month.