I roll this dough into a log and freeze it for an hour before slicing, or for 2 hours if it's chilling in the refrigerator. This dough may initially be a bit crumbly but it's easy enough to press it together into a ball and then roll into a log for easy slicing. Feel free to hand shape the cookies if you prefer.I slice the cookies between ¼ inch and ⅓ inch thick, or about the same width for each cookie. They bake a bit faster if they're on the thinner side.
Place the pecans on a baking tray and bake in the oven for 6 to 8 minutes or until a bit darker with a slightly toasted aroma.
Remove the pecans from the baking sheet and prepare the baking sheet with parchment paper.
Cool the pecans and chop into small pieces using a mortar and pestle, kitchen towel and hammer, or gently pulse in a food processor.
Add the chopped pecans, almond flour, coconut flour, baking soda, and salt to a bowl and whisk to blend well.
Add the maple syrup, butter, and vanilla extract to the dry ingredients and blend well with a spatula.
Use your hands to shape the dough into a ball. The dough can be a bit crumbly so press it well as you shape it. I break it up into two balls and roll each one separately.
Place the dough on a pieces of plastic wrap or parchment paper and roll the dough into a cylinder shape. Cover it and place in the refrigerator for about an hour in the freezer, or about 2 hours in the refrigerator. The dough should be firm.
Take the dough out, unwrap, and slice the cylinder into cookies about ¼ inch thick.
Bake the cookies for about 12 minutes or until they are slightly browned around the edges, bottom, and top.
Cool for about 15 minutes and enjoy! Store sealed in a container for a few days or in the refrigerator or freezer for a few months.