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Home » Recipes » Brownie + Bar Recipes

Peanut Butter Chocolate Chip Cookie Oat Bar

Modified: Dec 18, 2024 · Published Apr 23, 2024 · by Jacqueline Piper · 1 Comment · This post may contain affiliate links. Read our privacy policy.

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Stacked Peanut Butter Oat and Chocolate Chip Cookie squares.
Stacked Peanut Butter Oat and Chocolate Chip Cookie squares.
Stacked Peanut Butter Oat and Chocolate Chip Cookie squares with the text 'peanut butter oat & chocolate chip cookie bar'.
Stacked Peanut Butter Oat and Chocolate Chip Cookie squares.
Stacked Peanut Butter Oat and Chocolate Chip Cookie squares with the text 'peanut butter oat & chocolate chip cookie bar'.

This Peanut Butter Chocolate Chip Cookie Oat Bar is soft, chewy, and chocolatey. Made in a large baking pan, it's perfect for groups and get-togethers because it serves 24 and it's easy to make and then bring along with you right in the baking dish.

Stacked Peanut Butter Oat and Chocolate Chip Cookie squares.
Jump to:
  • Why you'll love this recipe
  • Ingredients
  • Instructions
  • Tips for making this recipe
  • Serve with ice cream
  • Storage
  • More cookie recipes
  • FAQs
  • Recipe

This is a delicious peanut butter cookie dessert made with oats and chocolate chips. If you're a fan of the peanut butter chocolate combo, as I am, then you'll love this easy cookie bar.

For more peanut butter and chocolate combos, try peanut butter chocolate Rice Krispie treats, chocolate peanut butter overnight oats, or peanut butter chocolate custard toast. For an easy dessert, try no bake chocolate peanut butter oat cookies.

Stacked Peanut Butter Oat and Chocolate Chip Cookie squares.

Why you'll love this recipe

  • Peanut butter and chocolate are a classic flavor combination.
  • Easy to mix: I mix this in just one bowl.
  • Oats provide fiber and a delicious chewy texture.
  • Makes 24 squares - enough for a crowd! This square is also not delicate, making it easy to transport to group get-togethers.

Ingredients

See the recipe card for exact amounts.

Cookie bars and made with the same ingredients as cookies but with a few changes. I like the butter on the softer side for a chewier texture. And there is no scooping involved.

  • butter and peanut butter: soft creamy peanut butter and softened (not melted) butter help provide flavor and achieve chewy texture.
  • white sugar and brown sugar for flavor and soft texture.
  • eggs, flour, vanilla, and baking powder: basic baking ingredients for structure, flavor, and lift.
  • oats: I'll say it again, adds chewiness. And a hearty bite.
  • chocolate chips: I use regular chocolate chips, you could use dark chocolate chips, bigger chocolate chunks, or try peanut butter chips to skip the chocolate.
An icon with a black cast iron skillet and the word Tip in white handwritten font.

Lining your baking pan with parchment paper helps prevent sticking and makes it easier to remove the cookie bar for slicing.

Stacked Peanut Butter Oat and Chocolate Chip Cookie squares.

Instructions

Prep Tips

  • Preheat the oven to 350°F (180°C).
  • Line a 9 x 13 baking pan with parchment paper.

To start cookie dough, cream the room-temperature butter and the peanut butter together. They'll combine into a super, creamy mix.

Add the sugars and mix them into the butter mix for a few minutes.

Then add the eggs and vanilla and mix again.

Next, add the dry ingredients. You can mix the oats, flour, and baking powder in a separate bowl if you like, but I always just pile them in. I just add the baking powder last and then mix it into the flour a bit with a fork.

Mix the dry ingredients in until combined and then add the chocolate chips.

Press the dough into the prepared baking pan, smoothing the top out with a wet spoon.

Bake for 20-25 minutes. Let cool for about 10-15 minutes in the pan and then lift out with the parchment paper and let cool completely on a cooling rack.

Cut into 24 and serve or refrigerate.

Stacked Peanut Butter Oat and Chocolate Chip Cookie squares.

Tips for making this recipe

  • Soft butter and creamy peanut butter help achieve a chewy texture. Make sure to let the butter sit out of the fridge, at room temperature for at least an hour before mixing.
  • Don't overmix the dough to help prevent a tough cookie dough.
  • Parchment paper is key to removing the bar from the pan for slicing. You can also slice it while it's still in your pan if you're not worried about marking the bottom of your pan with knife marks.

Serve with ice cream

For a decadent dessert serve these cookie bars with ice cream. Try chocolate peanut butter ice cream, butter pecan ice cream, Oreo cookie ice cream, or mint chocolate chip ice cream.

Storage

Store at room temperature, covered for 5-6 days.

More cookie recipes

  • A stack of three coconut sugar cookie bar squares.
    Coconut Sugar Cookie Bar Recipe
  • chocolate chip cookies on a plate
    Bakery Style Chocolate Chip Cookies
  • A plate of chocolate chocolate chip cookies.
    Triple Chocolate Nutella Stuffed Cookies
  • Classic Peanut Butter Cookies - PiperCooks
    Classic Peanut Butter Cookies

FAQs

Does the butter really have to be at room temperature?

Yes. Having room-temperature butter helps when you're creaming it with peanut butter so that it gets very smooth. It also contributes to a chewier texture.

Recipe

Stacked Peanut Butter Oat and Chocolate Chip Cookie squares.
5 from 3 votes

Peanut Butter Chocolate Chip Cookie Oat Bar

Author : Jacqueline Piper
Prep Time: 10 minutes minutes
Cook Time: 25 minutes minutes
Total Time: 35 minutes minutes
Servings: 24
Delicious peanut butter cookie bar with oats and chocolate chips. Perfect for groups and get-togethers.
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Ingredients
  

  • ½ cup butter at room temperature
  • ⅔ cup smooth peanut butter
  • 1 cup brown sugar
  • ½ cup granulated white sugar
  • 1 teaspoon vanilla extract
  • 2 large eggs
  • 1 cup all-purpose flour
  • 2 ½ cups rolled oats
  • 1 ½ teaspoons baking powder
  • ½ cup chocolate chips
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Instructions

  • Preheat oven to 350°F (180℃).
  • Line a 9 x 13 pan with parchment paper.
  • With a stand mixer or electric hand mixer, cream together the butter and peanut butter.
  • Add the sugars and mix well.
  • Add vanilla + eggs and mix to combine.
  • Next, add the dry ingredients. Combine the flour, oats, and baking powder in a small bowl, and then add to the large bowl. Mix until just combined then add the chocolate chips.
  • Scoop the batter into the pan and push it around to even it out. Use a wet spoon (keep re-wetting it) to smooth out the top.
  • Bake for 20-25 minutes.
  • Let it cool for a few minutes in the pan, then use the parchment to help lift it out onto a cooling rack to let it cool completely. This makes it easier to cut although it is super tasty when it's still warm, so you could dig in right away if you want to. I cut it into 24 squares.

Equipment

  • 9 x 13 Baking Dish

Nutrition

Calories: 215kcal | Carbohydrates: 28g | Protein: 4g | Fat: 10g | Fiber: 1g | Sugar: 17g | Calcium: 39mg | Iron: 1mg

Nutritional information is an estimate. Values vary based on products used. Read our full Nutrition Disclaimer.

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Stacked Peanut Butter Oat and Chocolate Chip Cookie squares.

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Peanut Butter Oat and Chocolate Chip Cookie Bar - PiperCooks
Peanut Butter Oat and Chocolate Chip Cookie Bar - PiperCooks
Peanut Butter Oat and Chocolate Chip Cookie Bar - PiperCooks

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Comments

    5 from 3 votes (2 ratings without comment)

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  1. Jacqueline Piper says

    April 23, 2024 at 10:26 am

    Let me know if you have any questions about this recipe!

    Reply
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