Step 1

In a microwave-safe bowl, melt together the peanut butter and butter until melted. Stir until smooth.

Step 2

Using a hand mixer (or a lot of arm power, beat in the powdered sugar until thoroughly combined. Mixture will be stiff.

Step 3

Line a 9x9 baking pan with parchment paper. Press the peanut butter mixture into the pan until even and compact.

Step 4

In a small bowl, melt the chocolate and 3 T peanut butter together in 30 second intervals in the microwave, stirring after each time until melted.

Step 5

Pour over the top of the peanut butter and smooth out to the edges.

Step 6

Place in refrigerator for 1 1/2 hours, or until firm. Cut into squares.