Step 1

Melt the butter in a medium-size saucepan over medium heat heat. Gently stir in the brown sugar and milk. Bring to a boil for 2 minutes, stirring frequently.

Step 2

Remove from heat and gently stir in the peanut butter and vanilla until fully combined.

Step 3

In a large mixing bowl, add the powdered sugar followed by the peanut butter/brown sugar mix. Beat until smooth.

Step 4

Pour into an 8×8 inch dish and chill in the refrigerator until firm.

Step 5

Once chilled, cut into squares and enjoy!