Simple Oatmeal Chocolate Chip Cookie Bars

Chewy, fudgy, delicious and packed with chocolate chunks and chips. These cookie bars are the perfect dessert on the go that is simple to bake and feeds a crowd easily.

While the world continues to give us more reasons to fall backward in our emotional states it seemed only fitting to continue to share some of my most comforting recipes that bring a smile to my face. These oatmeal chocolate chip cookie bars are definitely on the top of the list. Interestingly I have made this recipe so many times over the years and only last year I realized I have not shared it with you all yet. I shot this recipe in September 2025 and I am finally getting around to sharing it with you.

This is such a simple recipe and honestly comes together so quickly. Also you do not need a lot to make it, a mixing bowl and spatula is all you need. The ingredients are pretty basic pantry staples, you could use any chocolate you prefer but semi sweet or dark is the best for me. So lets get to this recipe.

What are oatmeal chocolate chip cookies?

This is a chocolate chip cookies but with the addition of rolled oats. You could use instant oats but that affects the texture of the cookie. The beauty about cookie bars is that you can dump the dough into a tin and bake it, cut it once cooled and serve. You do not need to chill the dough or scoop it out if you are feeling lazy. The oats here add a delicious texture to the cookies.

Are oat cookies actually healthy?

Let us understand healthy, anything in excess is unhealthy. Also, these cookies have butter, sugar, eggs, flour and chocolate, this may be considered as unhealthy as it is refined and processed but you are not eating an entire tray. So it is not the cleanest cookie but worth every bite, in moderation.

What ingredients do you need to make these oatmeal chocolate chip cookie bars?

The recipe is fairly straightforward like most cookie dough recipes. We need butter (in this case brown butter or you could use melted butter), brown sugar, egg, vanilla, rolled oats (this is a non negotiable – you cannot swap for instant oats), all purpose flour, corn starch, baking soda, salt. I’ve used chocolate chips and chunks for puddles once it bakes. I prefer dark or semi sweet as mentioned but you can use any you prefer.

What equipment do you need to make these oatmeal chocolate chip cookie bars?

To make the cookie dough we need a large mixing bowl and rubber spatula. It is baked in an 8×8 inch baking tin that is lined with baking paper.

Alternatives and substitutes –

To make this gluten free use a gluten free all purpose flour, cup for cup measure and a gluten free rolled oats. To make it eggless, add 1 flaxseed egg (1 tbsp flaxseed powder mixed with 2 tbsp water, allow it to sit until it forms a gel and use as you would the egg).

How to serve and store the leftovers?

Serving this cookie room temperature means you can cut them into squares and enjoy with a glass of milk. You could serve it warm and scoop it into a bowl, top with vanilla ice cream and seal salt flakes balances the sweetness. The leftovers can be stored in air tight containers at room temperature for 4 days.

Now that we have covered how to make this simple oatmeal cookie bars, you can have a look at the recipe video on my socials but let’s get to it.

If you try this recipe out, don’t forget to share it with me on instagram so I can see how it turned out. I’d love nothing more than to chat with you on your cooking/baking.