01 -
Line a standard 12-cup muffin tin with liners. Set aside.
02 -
In a medium bowl, add peanut butter, butter, and confectioners' sugar. Use a hand mixer on low to combine all ingredients. Set aside.
03 -
Add the chocolate to a microwave-safe bowl. Heat in 20-second increments, stirring after every 20 seconds, until the chocolate is melted and creamy (about 1-2 minutes total).
04 -
Add about 1 tablespoon of chocolate to the bottom of each muffin tin liner, just enough to fully coat the bottom. Top with 2 heaping teaspoons of the peanut butter mixture in the center. Add about 1 tablespoon of chocolate to the top of each cup. Carefully tap the muffin tin on the counter to help the chocolate settle and smooth out the tops.
05 -
Chill in the refrigerator for 1 hour, or until set, before serving.