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  • Writer's pictureErin

Peanut Butter Cookie Squares with Reese's Pieces


A stack of four square cut peanut butter cookie bars

If you are a fan of peanut butter cookies, then check out this chewy & soft cookie square made with Reese's Pieces baked into the dough. If you make them with peanut-free alternatives, they're a great snack for school lunches. Make up a few batches - they freeze great!

Prep Time: 20 min

Cook Time: 25-30 min

Cooling Time: 30 min

Yield: 24 cookie squares


  • 1/2 cup cold butter, grated

  • 1/3 cup white sugar

  • 1/2 cup brown sugar

  • 1/3 cup smooth peanut butter

  • 1 tsp vanilla extract

  • 1 egg yolk

  • 1 egg

  • 1 1/2 cup all-purpose flour

  • 1 cup quick oats

  • 1 tsp baking soda

  • 1/2 cup dried coconut, sweetened or unsweetened

  • 1 cup Reese's Pieces

  • 2 tbsp sprinkles


  1. Pre-heat oven to 350F.

  2. Grate your cold butter into your mixing bowl. Add your white sugar and brown sugar and cream until smooth and combined. Be sure to scape the sides down so all the butter and sugar become incorporated.

  3. Add the peanut butter, vanilla, egg yolk and egg to the mixing bowl and beat until combined.

  4. Add in the flour, oats, coconut and baking powder to the mixing bowl and beat until combined. Then mix in the Reese's Pieces and sprinkles.

  5. Once all the ingredients are well mixed together, spread the batter into a parchment lined 9 x 13 - inch baking dish. Press it down evenly into the corners and all around the pan using a rubber spatula.

  6. Bake in oven for 25-35 min or until the edges start to brown lightly and the dough in the middle is slightly 'puffed up' and doesn't look sunken & dense.

  7. Remove from the pan and let them sit for 30 min before you cut them up into squares.

Zhuzh it up!

  • Make them peanut-free for lunches by substituting the peanut butter with sunflower seed butter & use M&M's.

  • Make a cookie pizza (instead of a birthday cake) by baking this on a parchment lined pizza pan. Watch the time when you bake it, as a thinner pan may cook faster!


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