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Peanut Butter Monster Cookie Bars

A kitchen sink blondie for you to throw in all the leftover partial bags of candy in your pantry. We all have them. Smarties, M&M's, Reese, Rolos... Whatever you have. It's soft and gooey and full of peanut butter and chocolate...mmmm.

All the magic happens in one bowl. Easy peasy. Start with a blondie base and add 1/2 cup peanut butter. Toss in all your leftover candies, morsels and chocolate bits. Stir it all together and spread it in an 8x8 pan.

It comes out soft and gooey. Set around the edges and slightly set on top, but soft and delicious inside. It sets up more after you take it out of the oven. Don't over bake it. Let it rest for at least a half hour before cutting into it. The next day...and all week if they last that is still soft and chewy and peanut buttery and all those great things a perfect bar should be.

Give it a try! Enjoy!

Peanut Butter Monster Bar


  • 1/2 cup melted butter

  • 1 egg

  • 1 cup brown sugar

  • 2 tsp vanilla

  • 1/2 cup peanut butter

  • 1 cup flour

  • 1/2 cup chocolate chips or chunks

  • 1/2 cup peanut butter chips

  • 1/2 cup morsels/candy-coated bits of your choosing


  1. Preheat oven to 350°F.

  2. Prepare 8x8 pan with overhanging foil. Set aside.

  3. Melt butter and let cool for a minute so it doesn't scramble the egg.

  4. Whisk in the egg, sugar, and vanilla.

  5. Stir in peanut butter until totally combined.

  6. Add the flour. Stir just until combined.

  7. Stir all add ins.

  8. Spread in pan and bake for around 22 to 28 minutes until top is set.

  9. Let cool at least 30 minutes to a couple of hours before cutting.

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