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Bars & Brownies / Cookies / Desserts / One-Bowl

One-Bowl Chewy Oatmeal Raisin Cookie Bars

These one-bowl chewy oatmeal raisin cookie bars are everything you love about the classic cookie, in a thick, chewy bar. Raisins, oats, and cinnamon mixed into a rich cookie topped with a quick oat crumble. Simple ingredients, no chill time, and just about an hour to this delicious dessert. The oat topping adds extra cinnamon flavor and the perfect crunch, plus the buttery texture is unbeatable.

oatmeal cookie bars on a wire rack

These bars are full of delicious flavor and are much easier than making an individual cookie. Step-by-step instructions below!

Highlights of these cookie bars:

  • Chewy texture
  • Studded with raisins
  • Center stays gooey while outsides get slightly crisp
  • Family friendly
  • Great for crowds
  • Same classic cookie recipe, but easier!
  • Simple ingredients
  • Right amount of sweetness
  • Uses melted butter not softened butter, so mixing is easier

First Steps:

  • Combine sugars
  • Whisk together melted butter and sugar until combined
  • Add in eggs and vanilla
  • Mix in dry ingredients

Tips for successful oat bars:

  • Don’t overmix ingredients, only mix until incorporated.
  • Grease AND line your baking pan. I like to grease the bottom and corners really well and over line with a piece of parchment paper so I can easily lift out my bars.
  • Allow bars to cool completely, this helps so they don’t fall apart! Let them cool if you want nice even bars.
oatmeal raisin bars cut into chunks

Traditional oatmeal raisin cookies… just in bar form!

Tools I used for this easy recipe:

  • KitchenAid 6 Qt. Stand Mixer – I always recommend a stand mixer as it saves time and helps to keep baked goods consistent.
  • Rubber Spatula – a must for any home baker! Perfect for scrapping cookie dough out of the mixing bowl.
  • USA Pan 8 inch Square Pan – another USA Pan product I love! The corners of my bars and cakes never stick and I love the squared of edges this pan creates.

Grocery List & Substitutions:

  • All-purpose flour
  • Baking powder
  • Baking soda
  • Salt
  • Ground cinnamon
  • Unsalted butter, melted
  • Granulated white sugar
  • Light brown sugar
  • Large eggs
  • Vanilla extract
  • Old fashioned rolled oats
  • Raisins
  • Walnuts or Pecans (optional)

Second Steps:

  • Once wet and dry ingredients are evenly combined, fold in oats and raisins
  • Line and grease a baking pan
  • Transfer dough into prepared pan, press down evenly

If you like these oat and raisin bars you’ll love these simple reicpes…

Easy Soft & Chewy Oatmeal Raisin Cookies

Oatmeal Chocolate Chunk Cookies

Peanut Butter Chocolate Chip Oatmeal Blondies

Chewy Peanut Butter Oatmeal Chocolate Chip Cookies

Chewy Oatmeal Cookies

oatmeal raisin bar

These bars are studded with juicy raisins!

Instructions for the chewy oatmeal raisin bars:

  • Preheat oven to 350 degrees F. Grease and line an 8×8 inch pan with parchment paper, set aside. In a medium mixing bowl, combine the flour, baking powder, baking soda, cinnamon and salt, set aside.
  • In a large mixing bowl, combine the melted butter and sugars. Whisk until combined. Add in the eggs, one at a time, and the vanilla. Slowly add the dry ingredients into the wet ingredients. Mix until fully combined, fold in the oats and raisins.
  • Transfer the dough to the prepared baking pan, bake at 350 degrees F for 50-55 minutes until golden brown and a toothpick inserted into the middle comes out clean.* Allow to cool on a wire rack completely before cutting. Enjoy immediately or store in an airtight container for 3-4 days.

Notes:

*You don’t want to over bake these bars, start with less time and add more as needed. If the bars still seems jiggly in the middle bake for a few more minutes.  

Final Steps:

  • Combine crumble ingredients
  • Use your hands to mix until small clusters form
  • Sprinkle clusters on top of prepared dough
  • Bake until set

Variations:

  • Fold in chopped walnuts or pecans
  • Fold in or sprinkle on top a few chocolate chips or chopped dark chocolate
  • Substitute craisins or dried cranberries

One-Bowl Chewy Oatmeal Raisin Cookie Bars

5 from 4 votes
Course: Dessert
Keyword: Blondies, Cookie Bars, Cookies, Oatmeal Cookies, Oatmeal Raisin Cookies
Prep Time: 10 minutes
Cook Time: 50 minutes
Total Time: 1 hour
Servings: 12 servings
Calories: 544kcal
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Equipment:

  • 8×8 Baking Pan

Ingredients: 
 

  • 2 1/2 cup All purpose flour
  • 1 tsp Baking powder
  • 1 tsp Baking Soda
  • 1 tsp Salt
  • 1 tbsp Ground Cinnamon
  • 1 cup Unsalted butter, melted
  • 1 cup Granulated Sugar
  • 1 cup Light brown sugar, packed
  • 2 Eggs, room temperature
  • 1 tbsp Vanilla
  • 1 cups Old fashioned oats
  • 2 cups Raisins

For the topping:

  • 1/4 cup Old fashioned oats
  • 1/4 cup All-purpose flour
  • 1/4 cup Brown sugar
  • 1 tsp Cinnamon
  • 4 tbsp Unsalted butter, softened

Instructions:

  • Preheat oven to 350 degrees F. Grease and line an 8"x8" baking pan with parchment paper, set aside. In a medium mixing bowl, combine the flour, baking powder, baking soda, cinnamon and salt, set aside.
  • In a large bowl, combine the melted butter and sugars. Whisk until combined. Add in the eggs, one at a time, and the vanilla. Slowly add the dry ingredients into the wet ingredients. Mix until fully combined, fold in the oats and raisins.
  • Transfer the dough to the prepared baking pan, bake at 350 degrees F for 50-55 minutes until golden brown and a toothpick inserted into the middle comes out clean.* Allow to cool on a wire rack completely before cutting. Enjoy immediately or store in an airtight container for 3-4 days.

Notes:

*You don’t want to over bake these bars, start with less time and add more as needed. If the bars still seems jiggly in the middle bake for a few more minutes.  
*These can be made in a 9×13 pan, reduce baking time to 25-27 minutes.

Nutrition:

Serving: 1 cookieCalories: 544 kcalCarbohydrates: 87 gProtein: 6 gFat: 21 gSaturated Fat: 13 gPolyunsaturated Fat: 1 gMonounsaturated Fat: 5 gTrans Fat: 1 gCholesterol: 78 mgSodium: 348 mgPotassium: 312 mgFiber: 4 gSugar: 39 gVitamin A: 631 IUVitamin C: 1 mgCalcium: 73 mgIron: 3 mg

Nutritional information is only an estimate. The accuracy of the nutritional information for any recipe on this site is not guaranteed.

Enjoy your oatmeal raisin cookie bar warm with a big glass of milk!

Looking for more cookie recipes? Try these…

Coffee Cake Cookies Recipe

Soft Lemon Poppy Seed Sugar Cookies

Salted Toffee Chocolate Chip Cookies

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I would love to see it! Take a picture and post to Instagram with the tag @theheartylife and the hashtag #theheartylife – You can also leave me a question or comment below! If you’ve tried this recipe, feel free to give it a star rating on the recipe above.

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