Add peanut butter to a microwave safe dish. (Preferably glass)
Melt peanut butter until smooth in 20-30 second increments.
Add chocolate chips.
Melt chocolate chips until smooth in 20-30 second increments.
Stir together until smooth.
Add sweetened condensed milk.
Stir until well combined.
Pour out onto wax paper or parchment lined baking sheet and smooth out with spatula.
Chill for one hour.
Cut into small squares and enjoy.