Line two 12 count count mini-muffin pans with paper liners. Set aside. If you don't have two trays, just make one flavor at a time.
In a small bowl, combine peanut butter, butter, confectioner's sugar, brown sugar, vanilla and salt until smooth and well blended. Place in refrigerator.
Place the chocolate chips and shortening in a microwave safe bowl. Microwave in 20 second intervals, stirring in between, until melted and smooth.
Peanut Butter and Strawberry Jam Cups: Spoon one heaping teaspoon melted chocolate into each paper liner. Bang tray on counter so chocolate settles.Top with one teaspoon peanut butter, 1/2 teaspoon strawberry jam, and finally another heaping teaspoon of melted chocolate. Bang tray again on counter. Chill in refrigerator for about one hour.
Crispy Peanut Butter Cups: Spoon one heaping teaspoon melted chocolate into each paper liner. Bang tray on counter so chocolate settles.Top with one heaping teaspoon peanut butter, sprinkle with some crispy rice cereal, and finally another heaping teaspoon of melted chocolate. Bang tray again on counter, then top each cup with more crispy rice cereal. Store in airtight container in refrigerator.