Preheat oven to 325°F and line baking sheets with parchment or silicone liners.
Mix peanut butter and butter until smooth. Add sweetener, egg, and vanilla; blend well.
Incorporate almond flour, peanut flour, baking soda, and salt until dough forms.
Shape into 1-inch balls, place on sheets, flatten to 1/2 inch.
Bake for 12-15 minutes until soft and lightly browned.
Create a well in each cookie with a teaspoon, then cool completely.
Melt chocolate chips and peanut butter in microwave, stir until smooth.
Fill wells with melted chocolate mixture, refrigerate 30 minutes until firm.