01 - In a large mixing bowl, beat together the creamy peanut butter, softened unsalted butter, vanilla extract, and fine sea salt using a hand mixer or stand mixer until smooth and creamy.
02 - Gradually add the powdered sugar, mixing continuously until a thick, pliable dough forms that holds its shape when rolled.
03 - Scoop out heaping teaspoonfuls of the peanut butter mixture and roll into 1-inch balls. Arrange them on a parchment-lined baking sheet.
04 - Place the baking sheet in the refrigerator and chill the peanut butter balls for at least 30 minutes, or until firm to the touch.
05 - In a microwave-safe bowl, melt the chocolate chips with coconut oil or vegetable shortening in 30-second increments, stirring between each interval until completely smooth and glossy.
06 - Using a toothpick inserted into each chilled peanut butter ball, dip it into the melted chocolate, leaving the top portion uncovered to resemble a buckeye nut. Gently shake off any excess chocolate.
07 - Return the coated balls to the parchment-lined baking sheet and carefully remove the toothpick, smoothing over the hole with your finger if desired.
08 - Refrigerate the buckeyes until the chocolate coating is fully set, about 20 minutes.
09 - Serve chilled or at room temperature. Store any leftover buckeyes in an airtight container in the refrigerator for up to 2 weeks.