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 smooth and creamy.
02 - Gradually add the powdered sugar, one cup at a time, mixing thoroughly after each addition until the dough becomes stiff enough to handle without sticking to your hands.
03 - Scoop tablespoon-sized portions of the dough and roll them between your palms to form smooth, uniform balls. Arrange them on a parchment-lined baking sheet.
04 - Refrigerate the peanut butter balls for 30 minutes until they are firm to the touch and hold their shape during dipping.
05 - In a microwave-safe bowl, combine the chocolate chips and shortening. Microwave in 30-second intervals, stirring between each burst, until the chocolate is completely melted and smooth.
06 - Insert a toothpick into the top of each chilled peanut butter ball. Dip it into the melted chocolate, leaving the top third exposed to resemble a buckeye. Gently tap off any excess chocolate.
07 - Return each dipped cookie to the parchment-lined baking sheet. Refrigerate for 15 to 20 minutes until the chocolate shell is fully set. Remove the toothpicks and lightly smooth over any holes if desired.