Make peanut butter layer
Combine peanut butter, butter, sugar & salt until smooth.
Melt chocolate
Heat chocolate & peanut butter in the microwave.
Start making homemade peanut butter cups
Add the melted chocolate to lined muffin pan.
Add peanut butter layers
Top each chocolate layer with peanut butter mixture.
Finish making cups
Add remaining chocolate on top of peanut butter layer. Refrigerate to set.