Line a large baking sheet with parchment paper.
In a large bowl, cream together the softened butter (1/4 cup) and peanut butter (1/2 cup) using a hand mixer until creamy and completely smooth, about 2 minutes.
Add erythritol (1/2 cup), vanilla (1/2 teaspoon), salt (1/2 teaspoon) and peanut flour (1/2 cup). Beat for about 2 minutes, until everything is combined. The ingredients will look soft yet crumbly, we'll use the warmth from our hands to bring everything together.
Roll the mixture into 1" balls and place them on the prepared baking sheet. Continue until you've formed 21 balls. If the "dough" is too soft to form, place in the fridge until you can.
Place the baking sheet in the freezer for 30 minutes.
A few minutes before they're done, melt chocolate (1/2 cup) and coconut oil (1 tablespoon) together in the microwave using 30-second intervals at 50% power.
Dip the peanut butter balls into the chocolate, then return them to your baking sheet, and place the baking sheet back in the freezer until the chocolate has hardened - about 10 minutes.
Store in the fridge/freezer, and enjoy!