Preheat the oven to 350°F (175°C) and line a baking sheet with parchment paper.
Mix Dry Ingredients: In a medium bowl, combine the almond flour, coconut flour, baking powder, and salt. Set aside.
Cream Butter and Cream Cheese: In a large bowl, use an electric mixer to beat the softened butter and cream cheese until smooth and creamy.
Add Sweetener and Egg: Add the powdered erythritol and beat until fully incorporated. Add the egg and vanilla extract, and continue to beat until the mixture is well combined.
Combine Wet and Dry Ingredients: Gradually add the dry ingredient mixture to the wet ingredients, mixing until a dough forms.
Fold in Pecans: Gently fold in the chopped pecans until evenly distributed throughout the dough.
Shape Cookies: Scoop tablespoon-sized portions of dough and roll them into balls. Place them on the prepared baking sheet, spacing them about 2 inches apart. Flatten each ball slightly with your fingers or the back of a spoon.
Bake: Bake in the preheated oven for 12-15 minutes, or until the edges are golden brown. The cookies will still be soft in the center but will firm up as they cool.
Cool: Allow the cookies to cool on the baking sheet for 5 minutes before transferring them to a wire rack to cool completely.
Serve and Enjoy: Enjoy your keto cream cheese pecan cookies with a nice cup of coffee or tea!