Who wouldn’t want to eat a giant oatmeal cookie for breakfast? This overnight breakfast cookie lets you do just that!

No bake, vegan, with just 6 ingredients.
A single serving oatmeal breakfast cookie you can easily customize.
Mix the ingredients together the night before to have a wholesome breakfast the next morning, ready whenever you want it!
Readers also love this Almond Flour Banana Bread

The “single lady” breakfast cookie was inspired by two things.
First was an email I received from a reader who asked if I could come up with a recipe similar to the Erin Baker Breakfast Cookies sold in stores.
Her email reminded me of an idea I’d written down years ago but had never actually gotten around to trying.
There’s a recipe on my blog for Snickerdoodle Oatmeal, and one day a blogger named Abbie (whose blog is sadly no longer in existence) recreated my oatmeal recipe in the form of a giant breakfast cookie and posted about it on her blog.
She combined all of the ingredients in a bowl, spread the batter on a plate, and let the extra moisture evaporate overnight so it turned into a soft and delicious no-bake snickerdoodle breakfast cookie.
Her idea was so brilliant, and I don’t know why I didn’t try it until now! For more healthy breakfast ideas, be sure to check out the link below:

The flavor possibilities are endless…
Peanut Butter
Chocolate Brownie
Coconut
Banana Walnut
Cinnamon Raisin
Espresso Chocolate Chip
Cookie Dough
Watch the overnight breakfast cookie video above.

Overnight Breakfast Cookie
Ingredients
- 1/2 cup rolled oats
- 1/2 cup mashed banana or applesauce
- 2 tbsp milk of choice
- 1 1/2 to 2 tbsp protein powder or flour, such as almond or oat flour
- 1 to 2 tbsp nut butter or allergy-friendly sub
- 1/8 tsp salt
- optionsl add-ins such as chia seeds, raisins, shredded coconut, or chocolate chips
Instructions
- Stir all ingredients together. Spread out on a plate. Refrigerate overnight, uncovered or with a paper towel placed gently on top. Frost if desired, or add toppings such as melted peanut butter and chocolate. Enjoy!View Nutrition Facts
Notes
More Healthy Breakfast Options
Or these flourless Keto Blueberry Muffins






















I really enjoy this recipe! I actually have been using quick oats, because that is what I had after making s batch of regular no bake cookies a while back. However, I assume that I like the texture I get from the quick oats better than I would rolled. And I’m not aware that there are any real differences nutritionally. I am wondering, though, does anyone find that they have been able to actually pick it up like a cookie and eat it? The outside gets solid, but the inside is gooey, requiring me to have to use utensils. It’s not a huge deal, but I was hoping that I would be able to pick it up and take it to go. If someone could give me their experience with this, I’d appreciate it. Thanks.
I subbed sweet potato purée for banana/applesauce & worked great!
I made this last night but it didn’t set. :/ I’m not sure why. I’m going to give another shot, because it was delicious even with a spoon! 😉 Thanks for sharing!
I just made this and it was delicious! I subbed the apple sauce for mashed banana. The portion is pretty big so I actually split it in two (otherwise it’s a 600calorie breakfast!) People in these comments keep mentioning how they couldn’t pick it up/it didn’t set. If you watch the video on the post, you can see Katie eats it with a spoon… so I don’t think it is meant to be picked up and set like an actual cookie, It’s more like of a set cookie dough. Anyway, really good and I will 100% be making this again!
I made this recipe it was delicious. had some left and rolled them
into little bites dipped them in white chocolate then put in freezer.
eat them frozen delicious.
I made mine for the first time last night and it came out delicious
my god, your recipes are not only amazing but so simple!
It was so easy fast and delicious. I added pumpkin pie spice, cardamom, and cacao chips. I love that you change up the flavor so easily.
Yeah, I got 428 calories, even WITH skim milk and limiting the protein powder to 1&1/2 tbs, as well and only one tbs peanut butter. Definitely gotta be careful with the add-ins! Yikes!
Along with the add-ins, skim milk is also much higher in calories than cashewmilk or unsweetened almond milk, which have just 25-30 per cup if you wanted to look into one of those options for baking.
This is great! We added 1/2 tsp cinnamon and 2 tbsp raisins to make an oatmeal raisin breakfast cookie.
Would pb2 or almond powder reconstituted work here?
I love this recipe. It is my Sunday morning treat and seems so indulgent to eat a big cookie for breakfast!
Thank you so much for trying it 🙂
Can you substitute Greek yogurt for the applesauce?
We have never tried but don’t see why not. Be sure to report back if you try it!
If I made several servings at once would they last a few days in the fridge or would the consistency get weird? Can’t wait to try this!
Very filling and delicious! I added cinnamon and microwaved the whole thing in the morning, and wow this breakfast cookie is my new winter breakfast! Especially loved how simple the recipe is!!!
Didn’t get this one. Shouldn’t be called a “cookie”. It’s just cold, thick oatmeal.
But I’ve loved all the other Katie recipes I’ve tried. I just made the healthy Butterfingers.
Changing my comments. I Stir one of these up every day. Flip it over the second day. Leave it alone or cook it a little until firm/crisp enough. I usually warm it and top it with a little peanut butter/jelly mixture. OR, top with thawed frozen fruit.