01 - In a large bowl, beat the peanut butter, softened butter, vanilla extract, and salt together using a hand or stand mixer until the mixture is completely smooth and creamy.
02 - Gradually blend in the powdered sugar, adding 1 cup at a time, until the dough becomes stiff enough to hold its shape when rolled and no longer feels sticky to the touch.
03 - Scoop tablespoon-sized portions of the dough and roll them between your palms to form smooth, even balls. Arrange them on a parchment-lined baking sheet, spacing 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 - In a microwave-safe bowl, combine the chocolate chips and shortening. Microwave in 30-second bursts, stirring thoroughly between each interval, until the chocolate is fully melted and silky smooth.
06 - Insert a toothpick into the top of each chilled peanut butter ball. Dip into the melted chocolate, leaving the top third exposed to resemble the classic buckeye appearance. Gently tap and swirl to remove excess chocolate.
07 - Return each dipped cookie to the parchment-lined sheet. Once all are coated, refrigerate for 15 to 20 minutes until the chocolate shell is fully set. Remove the toothpicks and lightly press to smooth over any small holes if desired.