n a small saucepan, melt 1-1/4 cups chocolate chips and 2 tablespoons shortening over low heat, stirring just until mixture is smooth. Allow to cool slightly; mixture should still be pour able
Starting halfway up each paper cup, spoon about 2 teaspoons mixture over inside of cups, completely covering bottom half of each cup. Chill cups about 30 minutes, or until firm.
In a large bowl, combine confectioners' sugar, peanut butter, and butter; mix well. (Mixture will be dry.) Spoon evenly into chocolate cups and press down firmly.
Place remaining chocolate chips and shortening in saucepan and melt over low heat, stirring just until mixture is smooth. Spoon equal amounts into cups, spreading to completely cover peanut butter mixture. Cover and chill at least 2 hours, or until firm.