Thick and chewy Oatmeal Cookie Bars are a great treat for a crowd, potlucks and parties. They have the flavor you love from a great oatmeal chocolate chip cookie, baked into easy and delicious bars! 

Love brownies and cookie bar recipes? Try my Blondies, Snickerdoodle Bars, or Mississippi Mud Brownies!

Oatmeal Chocolate Chip Cookie Bars on a plate.

Weekends are my weakness when it comes to sweets. I usually go for cookies or bars of some sort because I can always count on having the ingredients on hand.

These Oatmeal Chocolate Chip Cookie Bars are a regular, sweet-tooth-satisfying weekend treat at our house!. Chewy, chocolate and oat goodness in every single bite!

Beat butter and sugars: In a large mixing bowl beat together the butter, brown sugar, and white sugar until smooth and light.

Add eggs: one at a time, mixing after each addition. Add the vanilla.

Mix dry ingredients: In a separate bowl combine the dry ingredients: salt, baking soda, baking powder, flour, rolled oats, and 1 cup chocolate chips.

Combine: Add dry ingredients to the butter mixture and stir until combined. Add chocolate chips.

Three process photos for making oatmeal cookie bar dough.

Press into greased pan.

A 9x13 inch pan with oatmeal cookie bar dough in it, ready to bake.

Bake for 25 to 30 minutes or until golden brown. Allow to cool completely before cutting.

Baked Oatmeal Chocolate Chip Cookie Bars cut into squares.

Storing and Freezing Instructions:

Storing instructions: Store covered at room temperature for 5 days or store in the fridge for 7-10 days.

Freezing Instructions: For best results, allow pan to cool completely. If you used parchment under the bars, lift the cooled bars out of the pan. Wrap the whole bar brick in plastic wrap and then aluminum foil. Freeze for up to one month. Thaw completely in the fridge before cutting into bars.

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Recipe

Homemade Oatmeal Chocolate Chip Bars cut into squares on parchment paper, ready to enjoy.
Prep 15 minutes
Cook 30 minutes
Total 45 minutes
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Ingredients
  

Instructions
 

  • Preheat oven to 350°F (180°C). Lightly grease a 9 x 13 inch pan with cooking spray or line with parchment paper.
  • Beat Butter and Sugar: In a large mixing bowl beat together the butter, brown sugar, and granulated sugar until smooth and light.
    1 cup butter, 1 cup light brown sugar, ½ cup granulated sugar
  • Add the eggs one at a time, mixing after each addition. Add the vanilla.
    2 large eggs, 2 teaspoons vanilla extract
  • Mix Dry Ingredients: In a separate bowl combine the dry ingredients: salt, baking soda, baking powder, flour and rolled oats.
    ½ teaspoon salt, 1 teaspoon baking soda, 1 teaspoon baking powder, 1 ½ cups all-purpose flour, 2 cups old-fashioned rolled oats
  • Combine: Add dry ingredients to the creamed mixture and stir until combined. Stir in chocolate chips.
    2 cups chocolate chips
  • Bake: Press into prepared pan and bake for 25 to 30 minutes or until golden brown. Allow to cool completely before cutting.

Notes

Yield: 24 Squares. Serving Size: 1 Square.
Storing Instructions: Store covered at room temperature for 5 days or store in the fridge for 7-10 days.
Freezing Instructions: For best results, allow pan to cool completely. If you used parchment under the bars, lift the cooled bars out of the pan. Wrap the whole bar brick in plastic wrap and then aluminum foil. Freeze for up to one month. Thaw completely in the fridge before cutting into bars.

Nutrition

Calories: 255kcalCarbohydrates: 33gProtein: 2gFat: 13gSaturated Fat: 8gPolyunsaturated Fat: 1gMonounsaturated Fat: 2gTrans Fat: 0.3gCholesterol: 36mgSodium: 182mgPotassium: 97mgFiber: 1gSugar: 22gVitamin A: 259IUCalcium: 38mgIron: 1mg

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I originally shared this recipe February 2016. Updated April 2018 and May 2022. Recipe adapted from All Recipes.

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About The Author

Lauren Allen

Welcome! I’m Lauren, a mom of four and lover of good food. Here you’ll find easy recipes and weeknight meal ideas made with real ingredients, with step-by-step photos and videos.

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4.92 from 1382 votes (1,175 ratings without comment)
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Sarah
10 months ago

5 stars
These are some of my favorite bars of all time. And so easy to make. I bake mine for 27 minutes. Definitely be sure to let them cool if you plan on taking them anywhere or else they won’t be set, but when it’s just me I love digging in right away.

Sydney
9 months ago
Reply to  Sarah

I bet you do

Christina Iraca
11 months ago

5 stars
One of my go to recipes for gatherings. The pan almost always comes home empty. Thank you for sharing!!

Cindy M
1 year ago

Can i use quick oats instead?

Judy Olson
11 months ago
Reply to  Cindy M

1. What was the answer to: can you use Quick Oatmeal for these?
2. Could you use raisins instead of chocolate chips? If so, do you have to soak them? I don’t do much baking with them, but my husband loves them.

Gwenyth
1 year ago

5 stars
I made 2 batches today, one with butter, one with butter alternative, as there is food allergies at our family event. Both turned out fantastic. I started watching them at the 20 minute mark. The tops were getting golden and the centre set at the 28 minute mark. They will be a tasty edition to our festivities, just in time for chocolate chip cookie day.

Faith
1 year ago

5 stars
Yummy!

Sheryll Lucky
1 year ago

5 stars
These cookies were wonderfully good! I did add cinnamon and roasted walnuts next time I will also add nutmeg. Melt in your mouth,chocolately chewy oatmeal. I will definitely make them again! Loved cooking them all at once. Saves alot of time and energy. Gave me a great idea! Making bar cookies for all my holiday sharing,this year.

Meredith
1 year ago

4 stars
Really wanted to give this a higher rating as the flavor was nice, but the edges were done-to-overdone at 25 min, while the center was still raw. (My oven temp is accurate.) Would recommend a one hour rest period for the dough in the fridge to help the oats absorbs some liquid before baking. Could also take the temperature down to 325 midway through the bake.

Colleen
1 year ago
Reply to  Meredith

A similar thing happened to me. I covered with foil and finished at 300 F.

Christy
1 year ago

I doubled the recipe and used a quarter sized baking sheet…this made them better for us gals with our coffee and/or tea…to heck the “big boys and their toys”!🤭💕🤫

Michelle Muggli
1 year ago

Fan favorite. I tóok a double batch to work and they didn’t last past coffee break time

Birdie
1 year ago

These are Deeelicious!
Now a favorite!

Karen
1 year ago

Could I half the butter and replace the other half with peanut butter?

Tori
1 year ago

This recipe looks so good, any tips for adding blueberries?