Remove the pits from the dates, then add them to a bowl.
Add the boiling water to the bowl of pitted dates.
Let the dates soak in the water for 10 minutes.
When the dates have finished soaking, preheat the oven to 350 degrees Fahrenheit.
Add the amaranth flour and baking powder to a mixing bowl, then mix well.
Add the dates and soaking liquid to a food processor or blender, along with the almond butter, vanilla extract, and salt.
Blend until smooth, then transfer that mixture to the mixing bowl with the amaranth flour and baking powder.
Use your hands to knead the ingredients until they are thoroughly combined and a cookie dough texture is achieved. This is a sticky job, so wear kitchen gloves if you prefer.
Use your hands to roll the cookie dough into 12 evenly sized balls and place them on a sheet pan lined with parchment paper.
Use your fingers to flatten the cookie dough balls into circle shapes.
Bake the cookies at 350 degrees Fahrenheit for 18 minutes, then let them cool to room temperature before removing from the pan and serving.