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