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Peanut Butter Cup Gooey Cookie Bars are chocolate chip cookie bars filled with peanut butter cups and gooey peanut butter filling! 

These are a peanut butter explosion in one of the best cookie bar recipes EVER.

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Peanut Butter Gooey Bars in a stack

You guys: Peanut Butter Cup Gooey Bars. These are going to be your BFF, promise.

Y’all know how much I like my gooey bar recipes. I’m constantly dreaming up new versions because…Can’t stop won’t stop.

Today I married my Chocolate Chip Cookie Gooey Bars and my love of Reese’s Peanut Butter Cups.

I didn’t even know what to call these: they’re cookie bars filled with gooey peanut butter and peanut butter cups.

These are INSANE – and insanely easy:

  • My best ever Chocolate Chip Cookie Recipe
  • Filled with peanut butter sweetened condensed milk
  • And peanut butter cups
Gooey Cookie Bars with Peanut Butter in a stack

What are these cookie bars?

My version of gooey bar is a cookie (or cake) bar. Half the dough is pressed into the pan, then it’s filled with sweetened condensed milk and topped with the rest of the dough.

I’ve made these in SO MANY ways, with cake mix and from scratch, and all different flavors and fillings, but THIS one is my favorite.

The base of the cookie bars starts with a double recipe of my favorite chocolate chip cookie dough. That recipe is my old standby and it produces the best chocolate chip cookies ever.

How to make Peanut Butter Cup Gooey Bars

Since my cookie dough is made with melted butter you can easily stir it together in one bowl with a spoon or spatula. Simply stir the butter and sugars, then add in the eggs, baking soda, salt and vanilla, and then the flour.

For chocolate chips you have choices:

  • Use regular chocolate chips (any kind)
  • Use mini chocolate chips
  • Use a combination of chocolate and peanut butter chips
  • Use chopped peanut butter cups

Trader Joe’s chocolate chips are my favorite – they stay melty and gooey even after the cookies cool.

How to make Peanut Butter Cup Gooey Bars

Peanut Butter Gooey Filling

My normal gooey bar filling is plain sweetened condensed milk, but for these bars I wanted a gooey peanut butter filling, so I mixed peanut butter with the SCM. This adds peanut butter flavor to every bite of these cookie bars.

I also filled the bars with miniature Reese’s Peanut Butter Cups. You can use any peanut butter cup size, just chop them if you use bigger ones than the minis.

How to make Peanut Butter Cup Gooey Bars process collage

Peanut Butter Cup Gooey Bars are simple to assemble: just press half the dough in the bottom of the pan. It’s pretty easy to do this, since it’s a pretty liquidy dough right after mixing.

The peanut butter sweetened condensed milk gets drizzled over the top, then add the peanut butter cups.

Drop pieces of the rest of the dough all over the top. It won’t be solid but it’ll bake together in the oven.

Gooey Cookie Bars with Peanut Butter in a stack overhead

When they bake up they become rich and gooey and so peanut buttery! Each bar is like a little meal that you can’t stop eating. Get out your glass of milk with these babies!

I can think of 100 reasons why you need to make the Peanut Butter Cup Gooey Bars recipe today. #1: because you just can’t NOT make them.

Other gooey bar recipes:

Have you made this recipe?

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Peanut Butter Gooey Bars in a stack
4.96 from 197 votes
The BEST EVER Peanut Butter Cup Gooey Bars – these chocolate chip cookie bars are filled with peanut butter cups and gooey peanut butter sweetened condensed milk!
Prep Time 22 minutes
Cook Time 46 minutes
Total Time 1 hour 8 minutes
Yield 36 servings
Serving Size 1 bar


  • 1 cup unsalted butter, melted
  • 3/4 cup granulated sugar
  • 1 cup light brown sugar packed
  • 2 large eggs
  • 1 tablespoon pure vanilla extract
  • 1 teaspoon baking soda
  • 1/2 teaspoon salt
  • 3 1/4 cups all-purpose flour
  • 3/4 cup chocolate chips
  • 30 Miniature Peanut Butter Cups see note
  • 1 14 ounce can fat-free sweetened condensed milk
  • 1/4 cup creamy peanut butter
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  • Preheat oven to 350°F. Line a 9×13” baking pan with foil and spray with cooking spray for easy removal.
  • Stir together melted butter with both sugars. Add eggs, one at a time, mixing completely.  Mix in vanilla extract, salt, and baking soda. Mix flour in slowly. Stir in chocolate chips.
  • Pour the sweetened condensed milk into a small bowl and add the peanut butter. Stir until smooth.
  • Press half the cookie dough in the prepared pan. (Spray your hands with nonstick cooking spray so it won’t stick to you.) Top the dough with peanut butter cups.
  • Pour sweetened condensed milk mixture over the top of the bottom layer (be careful to leave about 1/4” edge around the pan so the milk doesn’t touch the foil), then break up the remaining cookie dough and place on top of milk. Press with your hands to flatten. It will mostly cover but not completely cover the bottom layer.
  • Bake for about 30-35 minutes until the tops of the bars just start to get golden brown. Cool completely before slicing into bars.
  • Store in an airtight container for up to 3 days or freeze for up to one month. These are best served room temperature.

Recipe Video

Recipe Notes

Peanut Butter Cups:
  • Use 1 (4 ounce) bag minis (the bite size ones that come unwrapped) OR
  • About 30 miniatures that you unwrap and chop

Recipe Nutrition

Serving: 1bar | Calories: 206kcal | Carbohydrates: 32g | Protein: 4g | Fat: 8g | Saturated Fat: 4g | Cholesterol: 25mg | Sodium: 635mg | Fiber: 1g | Sugar: 23g
Nutritional information not guaranteed to be accurate
Course Dessert
Cuisine American

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Peanut Butter Gooey Bars

Peanut Butter Gooey Bars are the BEST chocolate chip cookie bar filled with peanut butter sweetened condensed milk and peanut butter cups. This is an EPIC easy dessert gooey bar everyone loves!

Dorothy Kern

Welcome to Crazy for Crust, where I share recipes that are sometimes crazy, often with a crust, and always served with a slice of life.

4.96 from 197 votes (173 ratings without comment)

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  1. These are AMAZING – thank you for sharing the recipe! The only thing I would do differently next time is try lining with parchment paper instead of foil. Depending on the sharpness of your knife, I found small shreds of foil would sometimes stick to the bottom of the bar after cutting. Everything else was absolutely perfect!

  2. I seen this and
    Looked so yummy I had to make them and OMG! They are the bomb!! I only had one stick of butter so I substituted with adding a half cup of extra virgin olive oil. I took pictures during and when done if you want them but Thank you so much for sharing this recipe

  3. When making these my cookie dough was extremely sticky and made it hard to press down in the pan. Anything you recommend to fix this?

    1. You can pop it in the fridge to chill it a bit if it’s too sticky, or spray your hands with nonstick cooking spray

      1. Thank you! I made them the night prior to my event and everyone absolutely loved them. Turns out it wasn’t much of a problem. They were delicious!