Combine ½ cup peanut butter, confectioners' sugar, butter and salt until smooth.
In a microwave, melt the chocolate chips, candy bars and remaining peanut butter; stir until smooth.
Drop teaspoonfuls of the chocolate mixture into paper-lined mini muffin cups. Drop a scant teaspoon of peanut butter mixture into each cup, and top each with another teaspoonful of chocolate mixture. If desired, decorate with sprinkles.
Refrigerate until set. Store in an airtight container.
