Combine coconut flour, xanthan gum, and erythritol into a bowl
Add eggs and vanilla extract and mix well.
Cut butter into small pieces and add to pie mixture; blend until smooth. You want the butter to be well mixed in; the crust mixture should not be chunky from the butter.
Wrap in plastic and chill in fridge for at least 1-2 hours.
Preheat oven to 350 degrees. Using parchment paper top and bottom, roll out the crust with a rolling pin to an approximately 12" circle.
Remove top parchment paper and place into a well-grease 9" standard depth pie pan and poke holes in the bottom with a fork. Cut any excess crust from around the edges and use excess to fix any cracks that may have occurred while placing the crust into the dish.
Bake in oven at 350 degrees until crust begins to brown, about 10 minutes.