01 -
Line an 8 x 8-inch square pan with parchment paper and set aside.
02 -
Combine creamy peanut butter and softened butter in a large bowl using an electric hand mixer until smooth. Gradually add powdered sugar while mixing. Incorporate vanilla extract and salt, mixing until fully combined; the mixture will be slightly crumbly.
03 -
Press the peanut butter mixture evenly into the prepared pan, smoothing the surface gently.
04 -
Place semisweet chocolate and butter in a microwave-safe bowl. Melt in 30-second intervals, stirring well between each, until smooth and fully melted.
05 -
Pour the melted chocolate mixture over the peanut butter base and spread evenly with an offset spatula to completely cover the surface.
06 -
Refrigerate the bars for 10 to 20 minutes or until the chocolate topping is firm to the touch.
07 -
Use a sharp knife dipped in warm water and wiped dry to slice the set bars into 16 portions. Serve and enjoy.