01 - In a large bowl, beat the creamy peanut butter, softened butter, vanilla extract, and salt together using a hand or stand mixer until the mixture is smooth and creamy.
02 - Gradually add the powdered sugar, one cup at a time, mixing thoroughly after each addition. Continue until the dough is stiff enough to roll into balls without sticking to your hands.
03 - Scoop tablespoon-sized portions of the dough and roll them into smooth, even balls. Arrange each ball on a parchment-lined baking sheet, spacing them about 1 inch apart.
04 - Place the baking sheet in the refrigerator and chill the peanut butter balls for 30 minutes until they are firm enough to handle during dipping.
05 - Combine the semisweet chocolate chips and shortening (or coconut oil) in a microwave-safe bowl. Heat in 30-second intervals, stirring between each burst, until the chocolate is completely melted and smooth.
06 - Insert a toothpick into each chilled peanut butter ball. Dip it into the melted chocolate, leaving the top third exposed to create the signature buckeye look. Gently tap and let any excess chocolate drip back into the bowl.
07 - Return each dipped cookie to the parchment-lined baking sheet. Once all have been coated, refrigerate for 15 to 20 minutes until the chocolate shell is fully set. Remove the toothpicks and lightly smooth over any holes if desired.