No Bake Oatmeal Bars


5 from 397 votes
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These no bake oatmeal bars are thick, soft, chewy, and made with just 3 ingredients! Ready in just 5 minutes, they are a healthy and delicious snack that is easily customizable!

no bake oatmeal bars

No Bake Oatmeal Bars

When it comes to healthy snacks, my favorite recipes to make are granola cups, granola bars, and these no bake oatmeal bars.

Growing up, I was considered to be quite the snack monster. My mom would always have to pack extra snacks in my lunch box, just to make sure my raging appetite could be satisfied. Being a doting parent, the snacks she’d pack would always be healthy, and often be fruit, crackers, or oat based bars.

It’s funny, as, throughout school and high school, I was NEVER a fan of packaged oat bars. My mum would always pack them for me and 9 times out of 10, they’d still be in my lunch box when I got home. It wasn’t until I started high school that I began to appreciate them as a filling and healthy snack. Now that I’m considerably older, snacking is still on my agenda, although this time, I make them myself. While I typically have a protein bar or a fat bomb, I’ve recently loved making no bake oatmeal bars! 

I’ve been meaning to share a no bake oatmeal bar recipe for quite some time. They’ve been my go-to snack lately, and keep me energized between meals! I love how it needs just 3 ingredients to make. No refined sugar and no dairy are needed, but you’d never tell. The texture is thick, soft, and chewy, and stable at room temperature. They are pleasantly sweet and full of peanut butter flavor, without being overpowering. 

With my work schedule often being away from home for most of the day, these have been an even bigger life saver, and I’ve included making some as part of my weekly meal prep.

How do you make no bake oatmeal bars?

The Ingredients

  • Rolled Oats– I used gluten-free oats, to ensure that they are gluten-free. You can use quick-cooking oats (instant oats) or oat bran, but I find those both lack the texture we want. 
  • Peanut Butter– Smooth and creamy peanut butter, with no added sugar. 
  • Maple Syrup– Gives the oatmeal bars sweetness, but holds them all together.

The Instructions

Start by microwaving your peanut butter and maple syrup together, until combined. Next, add in your oats and mix until a thick batter remains. Transfer into a lined 8 x 8-inch pan and refrigerate for at least 2 hours, to firm up. 


homemade oatmeal bars

Tips to make the best oatmeal bars

  • Melt your peanut butter and syrup together, before adding it to the oats. Melting them together ensures a smooth, warm, and thin texture, making it easier to mix into bars. Once the bars have been refrigerated, they will be incredibly thick and sturdy! 
  • Feel free to substitute the peanut butter for either almond butter or tahini. 
  • For some added textures and flavors, add some nuts, seeds, or chocolate chips.

Storing and Freezing peanut butter oatmeal bars

  • To store: Place leftover bars in a sealable container and keep them in the fridge at all times. They will remain fresh for at least 2 weeks.
  • To freeze: Chill your bars and then freeze them, by placing them in a ziplock bag. They will keep well frozen for up to 6 months.

peanut butter oatmeal bars

More healthy snack recipes to try

no bake oatmeal bars

3 Ingredient No Bake Oatmeal Bars

5 from 397 votes
These no bake oatmeal bars are soft, chewy, thick, and need just 3 ingredients to make! Ready in 5 minutes and the perfect healthy snack!
Servings: 24 Bars
Prep: 5 minutes
Cook: 5 minutes



  • Line an 8 x 8-inch pan with parchment paper and set aside.
  • In a microwave safe bowl or stovetop, melt the peanut butter with syrup until combined. Add the oats and mix well, until fully incorporated.
  • Transfer the mixture into the lined pan and press into it firmly. Refrigerate for at least 30 minutes, to firm up, before slicing into bars.


* Can use smooth almond butter, cashew butter, sunflower seed butter, or tahini instead.
** Can use agave nectar or honey (not strictly vegan) instead. 
TO STORE: Place leftover bars in a sealable container and keep them in the fridge at all times. They will remain fresh for at least 2 weeks.
TO FREEZE: Chill your bars and then freeze them, by placing them in a ziplock bag. They will keep well frozen for up to 6 months.


Serving: 1BarCalories: 98kcalCarbohydrates: 10gProtein: 4gFat: 5gSodium: 51mgPotassium: 122mgFiber: 2gCalcium: 17mgIron: 1mgNET CARBS: 8g
Course: Snack
Cuisine: American
Author: Arman Liew
Tried this recipe?Give us a shout at @thebigmansworld or tag #thebigmansworld!


Disclosure: This post may contain affiliate links. I may earn a small commission for my endorsement, recommendation, testimonial, and/or link to any products or services from this website.

Arman Liew

I’m a two time cookbook author, photographer, and writer, and passionate about creating easy and healthier recipes. I believe you don’t need to be experienced in the kitchen to make good food using simple ingredients that most importantly, taste delicious.

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Recipe Rating


  1. Not sure why mine didn’t firm up but it tasted fantastic as a cereal. The next time, I plan to be more accurate in my measurements and use a bit less oats which may be the problem. What do you think?

  2. 5 stars
    What a fantastic easy and tasty slice.
    Being a retired pastrycook i am always making slices and cakes but i think its time to get a bit healthier and your oatmeal slice
    Is a winner.
    Made it today and it is a big hit with the family.
    Will be trying more of your treats.
    Thank you very much,

  3. Hi, I know this is a really old post but is it safe to microwave some for like 5 – 15 seconds? (I’m really sensitive to cold things due to asthma)

  4. Hi there. These look great, but I would like to know approximate yield. Planning to make this as part of a preschool class cooking project. If you used a 8 x 8 inch pan, I would imagine that the recipe will yield 16 bars. I’m planning on buying the ingredients, but the preschool teachers will direct the kids in making them, so I would like to give them clear instructions. Thanks!

    1. Hi Leanna! I made them in an 8 x 8 inch pan, but I tend to get around 10 bars from it, mainly because I like larger bars 🙂

      1. Thank you! The kids at my son’s preschool loved eating these as much as they did making them.

  5. Hi! How many bars does 1/2 cups gluten free oat bran (Can sub for rolled oats, quick oats or oat flour, however see notes), 1/2 cup sunflower seed butter (Can sub for soy nut butter or nut butter of choice if not allergen specific), 1/2 cup brown rice syrup (can sub for any sticky sweetener however see notes) make? What size of pan would you recommend for this? Thank you!

    1. Hi Joy! The beauty of these bars is that you can make them in any size pan and slice them any size you like 🙂 I usually get 9-10 bars 🙂

    1. Hi Heather! Honey would definitely work, but you’d probably need to add a little bit more- It’s not as sticky as brown rice syrup! 🙂

    1. Hi Cassidy! If you plug the information into a calorie counting website, it will provide all the information you need 🙂 Once you cut them into your desired bar size, you can calculate each individual serving size based on that 🙂 Enjoy!

  6. These came out fantastic. Next time, I’d like a pattern artfully arranged in the chocolate chips. Maybe you can spell Meg or banana. 🙂

      1. Love your blog and the recipes I’ve tried so far, but after making a couple of no-bake bars with sunbutter, I’ve discovered I don’t really like it. I find the texture too dense and rubbery. Perhaps its because I used a jar variety and didn’t make my own from sunflower seeds? I’m not allergic to peanuts but I try to stick to paleo/primal as much as possible. Would love to see your version of a paleo fig cookie/pastry.

        1. Oh no! I’m sorry to hear that Ellen. Sometimes the texture can take some getting used to. If you not allergic, please try cashew or almond buter- They are my other stand bys 🙂

  7. Hey Arman,
    I love that you use sunflower seed butter in this recipe! What a great idea and what a nice addition of flavor.

  8. I was surrounded by so much peanut butter at school, that it’s kind of a miracle I made it through without dying. Could you imagine how horrible that would be? A world without The Spoon? 😛

  9. OH MY GOD IS THE SUNFLOWER BUTTER?!?! The last recipe I made were sunflower butter chickpea blondies…and they turned GREEN in the oven! I thought it was the imitation vanilla I used X-) Why does it do that?! I need to research this! Thanks Arman!

  10. Sunbutter is SUPER tasty. I don’t really buy it though, cause I don’t have much of a budget for it. However, next time I do I will try this. YAYAYAY!!!!

  11. Lots of allergies! Which is why I love that schools are actually making cafeterias safe for kids with them. These bars look amazing– sun butter is my fav!

  12. You’ve got some serious geometry skills, as in those bars are so perfectly shaped! And the look delicious.

  13. I always have these ingredients on hand so it would def be so easy to make these in my college apartment! I agree that food allergies have grown a big deal in the last decade, in elementary school my bff was allergic to peanuts and there was a serrate lunch table for those kids who were allergic to peanuts, now there are so many more allergies wheat, dairy, eggs and things you would never think people would be allergic too!

    1. Oh wow- I have heard about the separate lunch table shenanigans. I swear with all these new foods, more allergies become prevalent!

  14. It’s ‘funny’ how almost all bloggers overseas seem to know the banning of certain foods for allergy reasons. That was never an issue around here. Nonetheless, I’m sure the simplicity and low cost of these bars has the potential of convincing many parents to prepare their own bars instead of going for sugar-laden storebought ones.

    1. Things change in society and lifestyle influences have this impact. My friend in Hamburg says there are allergy issues at her workplace 🙂

  15. It seriously scares me how prevalent food allergies are in schools these days! I worked at a day care for over a year and seriously would go around pouring 10 different kinds of nut milks, soy milk, 2% etc. then go down the line of who is gluten free, who is pork free, who has to be put on a lockdown from nuts (can you imagine if i was allergic to nuts =l) It also frightens me that people think it could be the GMOs/artificial things that are leading to allergies and disorders like autism and AHHH WHAT IS THE WORLD..

    but before it gets too eternally depressing, let me just say how much i love sunflower butter, even though it is a heinous color of poopy brown. These look delicious though, even if i am “green” with envy 😉

  16. No allergies for me, however I actually do love sun butter! Love how simple yet tasty this recipe is, perfect for anyone :)!

  17. Haha – too funny Nikki claimed she was allergic to YOU! I’ve have a co-worker who says that to me – guess I shouldn’t share these bars with him!
    These sound perfect for back-to school snacks or even after school treats!

  18. Sadly, I am allergic to dairy, but I would be devastated if I were allergic to nuts! I do love sunflower seed butter, so I will try these as is!

  19. Isn’t it so cool how sunflower seed butter turns stuff green? Apparently, the seeds contain chlorophyll so when it is exposed to air or heat, it turns green! It really is no surprise I’m going into Biology at uni #proudsciencenerd

  20. thankfully i dont have any allergies because i love nutzzzzz…:P

    these look like something I can whip up because #sweettooth. When are you coming to Dallas?

  21. No Bake… 3 ingredients… Oat Bars… could this recipe be any more perfect?? I think not!! Making them this weekend.

  22. Allergic….yes….to gluten (is that even an allergy?), dairy, eggs, soy, apples, oranges. mangoes, cocoa, coffee, seafood, and intolerant to all types of sugar minus agave and stevia. HELP! But I did used to tell my parents that I was allergic to a popular hardware store chain here in the USA. I used to sneeze every time I went in there so my sis was convinced too!

  23. I just ran out of the fudge. Okay I just ate 4 pieces of fudge for breakfast and need substitutes now. I love that you used sunbutter as this is the only nut butter I still have at home. Yes I completely ignore that sunflower seeds are no nuts. Luckily I am not allergic to any nuts or seeds so I can afford the ignorance!
    So this was basically the longest possible way to say that I am making those tonight 😉

  24. I’m allergic to people who are allergic to peanut butter.
    Kidding, of course. I guess I could live off of sunflower seed butter or almond butter while sneaking spoonfuls of peanut butter in a bush somewhere.
    But seriously, these look mighty tasty. Hooray for three ingredients!

  25. Loving these oatmeal bars Arman! My kids will too. Can’t believe they are only three ingredients. Delicious!

  26. Hahaha…”Keep quiet and eat pie. Minus the pie.” I love it! I just got back from visiting my sister, and I would have loved to use that line on her. Also, these bars look awesome. I’ve never used sunflower seed butter before, but I am totally intrigued. I need to check it out. And then I need the pie that Niki didn’t eat.

  27. I definitely thought I was allergic to my older brother at times when I was growing up, but it turned out that I was only allergic to grass/dust/pollen. I still avoided him at all costs though.
    I love easy/no bake recipes! Keep them coming!

  28. When I was a kid, I didn’t know anyone who had food allergies. Now it seems like everyone has one! I’m very lucky that I can eat whatever I want. These look delicious and crazy easy!

  29. These are great for kids to bring to school since most schools now are going nut free. I do have some allergies including almonds and walnuts which gets really annoying! It’s not a severe nut allergy but I do need to be careful.

    1. Thank Goodness- I can only imagine candy stores suffering without your consumption 😉 (still in fudge mode)

  30. My kids can’t bring nuts into their classroom for snack and these looks great to try as a homemade option 🙂 I have no food allergies but might have a few people allergies, you bring up a good point!