Preheat oven to 350 degrees. Line a 9X13 baking dish with parchment paper. Combine melted butter, brown and white sugar in a bowl. Mix with spoon. Next add in, eggs, vanilla, salt, baking powder and flour. Continue to mix with a spoon until combined. Next fold in peanut butter chips. I didn’t use a mixer when I made this and it worked really well. Press batter into your 9X13 dish. Bake for 25 minutes or until the center tests done. Let blondies cool and then add icing.
Icing Directions:
Combine butter, peanut butter and milk in a pan on top of the stove over medium heat stirring continuously. Add powdered sugar, continue stirring to melt all ingredients together. You can add more milk if frosting gets too thick. Spread with a knife over blondies.
Notes
All oven temps vary, which means baking times may vary.