These oatmeal cookie bars are a heartier, chewier version of my chocolate chip cookie bars! Buttery, thick, chewy, and chock full of oats and (optional) chocolate pieces, these are easy to make with no mixer required!
Be sure to check out my step-by-step video just below the recipe!
Cookie bars are the ultimate sweet treat for when you really want cookies but are just too lazy to spend an hour scooping cookie dough.
Alright, so they’re really good anytime, but I’ve been there before too many times to count. Some of my favorite recipes were born of sheer laziness and cookie dough scooping fatigue (I’m looking at you, sugar cookie bars).
And while the lazy factor is a big plus for me, the best part is that we sacrifice nothing in terms of taste. These oatmeal cookie bars are like one of my big soft oatmeal cookies, only even thicker and chewier and loaded with a variety of (optional) chocolate chips. Oh and let’s not forget the best part: no chilling and no scooping required!
While you can make these cookie bars “plain” with no add-ins, I love adding chocolate chips or even chopped nuts to mine. For today’s oatmeal cookie bars I used a blend of milk and semisweet chocolate and butterscotch chips.
Occasionally I’ll toss in chopped walnuts as well. My last batch was a mix of walnuts, dark chocolate and caramel chips (here’s where I’d insert the drooling emoji if I could find it on my keyboard).
You can add your favorite add-ins, but I recommend only using about a cup and a half.
If you’re feeling a little lazy yourself this morning (or evening, or whenever you’re reading this) but also hear your sweet tooth calling, this is the dessert for you.
Let me know what you think of it! My sister-in-law loved these and if you like them half as much as she did they’ll be well worth your time.
Enjoy!
Looking for more lazy-day bar cookie recipes?
Oatmeal Cookie Bars
Ingredients
- 1 cup butter melted (226g)
- 1 cup light brown sugar tightly packed (200g)
- ½ cup sugar (100g)
- 2 large eggs + 1 large egg yolk
- 1 ½ teaspoons vanilla extract
- 1 ¼ cup all-purpose flour (157g)
- 2 teaspoons cornstarch cornflour in UK
- ½ teaspoon baking powder
- ¾ teaspoon salt
- ¼-½ teaspoon ground cinnamon optional
- 3 cups old fashioned rolled oats (285g)
- 1 ½ cups chocolate chips optional, I did a mix of semisweet chocolate chips, milk chocolate chips, and butterscotch chips (255g)
Instructions
- Preheat oven to 350F (175C) and line a 9x9 metal baking pan with parchment paper or grease and flour the sides and bottom of the pan.*
- Combine butter and sugars in a large bowl and stir until well-combined.
- Add eggs and vanilla extract and stir well.
- In a separate bowl, whisk together flour, cornstarch, baking powder, salt, and cinnamon (if using).
- Gradually add dry ingredients to wet until completely combined.
- Add oats and chocolate chips and stir until well combined.
- Spread cookie dough evenly into prepared baking pan and bake on 350F (175C) for 35-40 minutes or until a toothpick inserted in the center comes out clean or with a few moist crumbs.
Notes
Nutrition
Nutritional information is based on third-party calculations and should be considered an estimate only. Actual nutritional content will vary based upon brands used, measuring methods, cooking method, portion sizes, and more.
John
Made it once, left it in a bit too long, and it was (predictably) a little dry, but still good. Tried it again, right at 35 minutes, and did 1 cup each of white chocolate chips and craisins. 👍👍👍
Emily @ Sugar Spun Run
We are so glad you tried them again, John! Thanks for commenting ❤️
Rose
excellent recipe!
I made the mix between chocolate and butterscotch and it was delicious. Texture was exactly what I was looking for in a bar. First recipe from your site and I subscribed because I was impressed.
Emily @ Sugar Spun Run
Yum, that sounds delicious! We’re so happy you loved the recipe and decided to subscribe, Rose! 🥰
Wendy
Can you use quick oats?
Emily @ Sugar Spun Run
You could, but the texture won’t be the same. Hope that helps!
Nancy Bailey
Look so yummy! Can you also add chopped pecans in addition to chocolate chips?
Nancy
Emily @ Sugar Spun Run
Yes you can! Enjoy 😊
TJ McCoy
How do I increase the recipe yo bake in a 9×13 baking pan (aluminum)?
Sam
A 50% increase should suffice here. I’m not sure on a bake time. 🙂
Jamie
Can these be baked in an 8×8?
Emily @ Sugar Spun Run
Hi Jamie! That should work fine, but your bake time will be different. 😊
Paige Larson
Another great recipe! I love their chewiness when I’m craving an oatmeal chocolate chip cookie but these are so much easier since I don’t have to keep on scooping dough. I enjoyed the cinnamon aspect but husband did not…so more for me!
Sam
More for you is never a bad thing. 😉
Lisa
I would like bake in a cupcake pan so they are individually pre-wrapped. How long do you recommend they be baked?
Emily @ Sugar Spun Run
Hi Lisa! We’ve never done this before, so we can’t say for sure how these would turn out or how long they’d bake. Please let us know if you do try it! 😊
Deborah
I add craisins and walnuts instead of chocolate chips. They are the best breakfast bar!!!!
Sam
I’m so glad you enjoyed them so much! 🙂
Helen
Where do you get caramel chips?
Sam
Hi Helen! I once could typically find them alongside the chocolate chips in the baking aisle of my grocery store, but these days I’m finding that fewer stores are carrying them, and I haven’t been able to find any in a while 🙁
Patty
For cinnamon chips, try Walmart. They don’t always have them, but that’s the only place I’ve been able to track them down
Shauna
Trader Joes had caramel chips. 😀
Joan
I made these cookie bars for dinner tonight & we all agreed they are amazing…so chewy & buttery. They were still slightly warm so the chips were still a little gooey! YUM! Thanks for sharing this great recipe!
Thet Munoz
Thanks again Sam! 😊💕Have baked this a lot of times because my family loves it so much.
Sam
I’m so glad everyone enjoyed them so much! 🙂