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Home / Desserts

Chocolate Chip Oatmeal Cookie Bars

These tasty treats will keep you coming back for more!  This is a great recipe to get the kids in the kitchen – they’ll enjoy helping and love the results too!

Erren Hart

|

last Updated:

03/25/2025
4.93 from 26 votes
Jump to Recipe Video
Serves: 24 bars
Prep: 15 minutes mins
Cook: 30 minutes mins
Chocolate chip oatmeal cookie bars cut into squares and a stack of the bars with melty chocolate chips.
Three Chocolate Chip Oatmeal Cookie Bars stacked on top of each other.

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This easy recipe for Chocolate Chip Oatmeal Cookie Bars is a one bowl buttery treat perfect for holidays and bake sales.

Three Chocolate Chip Oatmeal Cookie Bars stacked on top of each other.
Pin This Recipe For Later!

A One Bowl Recipe

These Cookie bars are literally the most simple thing you will ever bake. You don’t need to be a master baker to perfect this recipe.

You will be thrilled with the results. If these are a winner, why not try my Salted Toffee Cookie Bars or Double Chocolate Chip Cookie Bars, once you’ve made cookie bars, you’ll never go back!

My twist on these chocolatey delights is to use cinnamon and nutmeg as well as vanilla, resulting in a mouth-watering spiced surprise.

Why This Recipe Works

  • The spices along with the vanilla add an extra depth of flavor
  • The melted butter keeps things simple and hassle-free.
  • The brown sugar adds a caramel flavor as well as a chewy consistency

What Is a Cookie Bar?

A Cookie Bar is cookie dough that’s spread and baked in a pan, as opposed to making individual cookies. Once baked it’s cut into bars. Easy!

The Best Oats For This Recipe

The best oats to use are old fashioned rolled oats. Instant oats will not work with this recipe. Old fashioned rolled oats are best for baking as they hold their shape and give you the chewy consistency you’re looking for. 

Which Chocolate Chips?

The best chocolate chips to use are the ones you love best. There are no rules!

Step By Step Instructions

Preheat the oven to 375 degrees F/190C.  Grease and flour a 9 x 12 baking pan. 

Add the flour, salt, baking soda, baking powder, cinnamon, and nutmeg together into a large mixing bowl.

A glass bowl with the dry ingredients sifted into it

Add the butter, brown sugar, granulated sugar.

The sugars added to the bowl with the dried ingredients.

Add the eggs, vanilla, and oats and mix until combined.

The rolled oats added to the ingredients

Add the chocolate chips and mix to combine

The chocolate chips added to the bowl.

Spread evenly into the pan

The mixture spread into the pan

Sprinkle with extra chocolate chips.

The dough in the pan with extra sprinkled chocolate chips

Bake until golden. Allow cooling for ten minutes before removing from the pan.

How to tell if The Bars Are Ready

After baking for 30 minutes, give the pan a little shake. If it jiggles in the middle, put the pan back in the oven and try again every 5 minutes until there is no longer any jiggle.

The baked cookie in a pan.

Slice into cookie bars.

How To Cut Cookie Bars

  • Position a clean ruler on the top of the cooled, baked bars.
  • Use a small knife to score a line as a cutting guide in even intervals both horizontally and vertically.
  • Starting in the middle, line up the knife between scored cut marks and cut.
The sliced chocolate chip oatmeal cookie bars.

Serve and enjoy!

The sliced cookie bars being broken in half

For Best results

  • For a more even look, use an offset spatula to spread the dough evenly into the pan.
  • For a more professional looking slice cool the cookie bars completely before slicing. You can also chill in the refrigerator to fully set before slicing. Chilled bars cut cleaner.
  • Use a ruler for your first slice to make the straightest possible cut.
  • I recommend using a wooden spoon instead of a mixer in this recipe to avoid over mixing, which will result in a tougher bar.

FAQs

Can you freeze this recipe? Yes, cookie bars freeze really well wrapped well in plastic and finished with foil for up to three months.

How Do You Store Cookie Bars? Cookie bars can be stored for 3 – 4 days right in their baking pan covered tightly with aluminum foil or cut and stored in an airtight container.

Other Great Cookie Bars

  • Billionaire Shortbread Cookie Bars
  • Cinnamon Raisin Oatmeal Cookie Bars
  • Triple Chocolate Chip Cookie Bars

Rate This Recipe

Click here to leave a star rating!

Three Chocolate Chip Oatmeal Cookie Bars stacked on top of each other.

Recipe

Chocolate Chip Oatmeal Cookie Bars

These tasty treats will keep you coming back for more!  This is a great recipe to get the kids in the kitchen – they’ll enjoy helping and love the results too!
4.93 from 26 votes
Print Pin
Prep Time: 15 minutes mins
Cook Time: 30 minutes mins
Total Time: 45 minutes mins
Serves 24 bars

Ingredients

  • 2½ cups all-purpose/plain flour
  • ½ teaspoon salt
  • 1 teaspoon baking powder
  • 1 teaspoon baking soda/bicarbonate of soda
  • 1¼ cups salted butter (melted)
  • 1½ cups packed light-brown sugar
  • ½ cup granulated sugar
  • 2 large eggs (at room temperature)
  • 2 teaspoons vanilla extract
  • ½ teaspoon cinnamon
  • ⅛ teaspoon nutmeg
  • 2 cups rolled oats
  • 1¼ cup chocolate chips

Instructions

  • Preheat the oven to 375 degrees F/190C.  Grease and flour a 9 x 12 baking pan
  • Sift the flour, salt, baking soda, baking powder, cinnamon, and nutmeg together into a large mixing bowl.
  • Add the butter, brown sugar, granulated sugar, eggs, vanilla, and rolled oats.  Mix until combined. Fold in 1 cup of chocolate chips and spread evenly into the pan. Sprinkle with remaining chocolate chips.
  • Bake 30 minutes. After 30 minutes, give the pan a little shake. If it jiggles in the middle, put the pan back in and try again every 5 minutes until there is no longer any jiggle.
  • Remove from the oven and let cool 10 minutes before cutting. Best served warm, but great cooled as well.

Tips

  • For a more even look, use an offset spatula to spread the dough evenly into the pan.
  • For a more professional looking slice cool the cookie bars completely before slicing. You can also chill in the refrigerator to fully set before slicing. Chilled bars cut cleaner.
  • Use a ruler for your first slice to make the straightest possible cut.
  • I recommend using a wooden spoon instead of a mixer in this recipe to avoid over mixing, which will result in a tougher bar.
Show Nutrition Hide Nutrition

Nutrition

Calories: 270 | Carbohydrates: 37g | Protein: 3g | Fat: 12g | Saturated Fat: 7g | Cholesterol: 40mg | Sodium: 193mg | Potassium: 81mg | Fiber: 1g | Sugar: 22g | Vitamin A: 330IU | Vitamin C: 0.1mg | Calcium: 38mg | Iron: 1.2mg
Created by Erren Hart
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Update Notes: This post was originally published on Aug 29, 2016, but was republished with new photos, step by step instructions, tips, and FAQs in Jan of 2020.

4.93 from 26 votes (13 ratings without comment)

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32 responses

  1. Amanda L Avatar
    Amanda L
    08/18/2023

    Such a winner in our house! I’ve made them once a week since I found the recipe! Thank you!!

    Reply
    1. Erren Hart Avatar
      Erren Hart
      08/19/2023

      Hearing that you enjoyed the recipe makes all the hard work worthwhile. Thank you for sharing your positive experience.

      Reply
  2. Jennifer R Howell Avatar
    Jennifer R Howell
    06/07/2021

    Very easy to make. Helps to put in fridge , keeps shape of cookie instead of spreading out on pan

    Reply
    1. Erren's Kitchen Avatar
      Erren’s Kitchen
      06/08/2021

      Glad you liked it Jennifer 🙂

      Reply
  3. Debbie H Avatar
    Debbie H
    04/01/2021

    These were a hit in this house. We are chocoholics. I used twice as many chocolate chips as iin the recipe. Perfection! Thank you!

    Reply
    1. Erren Hart Avatar
      Erren Hart
      04/01/2021

      I’m delighted to hear you liked it so much! 🙂

      Reply
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