Combine peanut butter, peanut flour, sweetener, and vanilla. Mix thoroughly. You may need to knead it with your hands to incorporate all the peanut flour. Divide into 12 pieces and shape into eggs. Put on a baking sheet lined with wax paper. Refrigerate for an hour or two.
Melt the chocolate in the microwave or in a double boiler. I normally microwave in short increments stirring every 20-30 seconds. To cover the eggs it is easiest to pick one up and spread the bottom with chocolate using a small spatula. Put it back down on the tray chocolate side down. Once you've done all the bottoms you can use the spatula to spread the chocolate on the tops and sides.