Chewy Oatmeal Bar Cookies

This Chewy Oatmeal Bar Cookie is packed with marshmallows, chocolate chips, and coconut flakes. It is so delicious—and tastes like an old-fashioned chewy granola bar.

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Chewy Oatmeal Bar Cookies

This breakfast bar is buttery, chewy, and full of oatmeal. It’s easy to make, and no mixer is required. This is the perfect recipe for when you want a cookie treat but don’t want to make cookies from scratch. Oatmeal bar cookies are so easy to make. Simply mix, pour, and bake. Easy—Peasy.

If you are looking for cookie bar recipes, then check out my recipes for S’mores Cookie Bars and Vanishing Oatmeal Bars 

What You’ll Love About these Oatmeal Cookie Bars

• Simple: They are super easy to make
• A Fan Favorite: Chewy, sweet, and delicious
• Old-Fashioned: This recipe comes from an old church cookbook dating back to the 1970s.

Ingredients You’ll Need

• 1 cup of unsalted butter
• 1 & 1/2 cup of brown sugar
• 4 cups of oatmeal
• 1 cup of coconut flakes
• 1 cup of chocolate chips
• One bag of mini marshmallows

How to Make Chewy Oatmeal Bar Cookies

Preheat the oven to 350 degrees Fahrenheit

In a large bowl, mix everything.

Pour into a 9×13″ baking pan and spread out

Bake for 20 minutes

Let the bars cool slightly, but cut into bars while still warm

When it’s first pulled out of the oven, it will seem gooey and will look like it will never stiffen into a bar, but it will. You have to give it some time to set (about an hour)

Expert Tips

I did not do this and wished that I had. Cream the butter and sugar before folding in the rest of the ingredients. I think it will make everything come together a lot faster and smoother.

To avoid the oatmeal sticking to a knife, use a silicone spatula to cut oatmeal bars

Variations

Blueberry Oatmeal Bar Cookies – Replace the chocolate chips with fresh blueberries

Cranberry and Pecan Oatmeal Bar Cookies – use sweetened dried cranberry and pecans in place of chocolate chips

Butterscotch Oatmeal Bar Cookies – Add butterscotch chips in place of chocolate chips

What to Serve With

• Eggs in a Muffin Tin
• Semi-Homemade Blueberry Muffins
• Ham Puffs
• Copy-Cat Orange Julius
• Orange Dreamsicle Salad Recipe

FAQs

Can I use Quick Oats instead of Old-Fashioned Oats?

Yes. Oats are interchangeable. The only difference you will notice is that old-fashioned oats will be more chewy than a quick oat would.

Storing and Reheating

Store oatmeal cookie bars at room temperature. Covering them will help them retain moisture, but it is unnecessary. They will stay soft and chew for a few days.

More Breakfast Recipes You’ll Enjoy

Serving Size

This recipe will make about two-dozen oatmeal bar cookies

You can double the recipe, but you’ll need to use a larger pan for baking purposes

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Printable Recipe

~Melissa – KidFriendlyThingsToDo.com – recipes, fun foods, party ideas, and fun things to do with the whole family!

Adapted from Calvin Christian School Cookbook