In the bowl of a stand mixer, beat together the cocoa powder, coconut oil, powdered Swerve, peanut butter, and vanilla extract. If desired, stir in pecans.
Transfer to the prepared pan and spread evenly on the bottom of the pan.
Sprinkle additional nuts on top of the fudge if desired.
Freeze for 1 hour, and then cut into pieces.
Store in the refrigerator or freezer until serving.
Notes
Carbohydrate Count does not include the allulose as it is removed from the net carbs.