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Home  ›  Recipes  ›  Course  ›  Snacks  ›  Bars & Balls

No Bake Peanut Butter Oatmeal Bars

See Recipe Review

Posted:

06/09/21

Updated:

10/02/24

By:

Ashley Walterhouse

This post may contain affiliate links. See my disclosure policy.

Quick, No Bake Peanut Butter Oatmeal Bars are made with oats, peanut butter, and some protein powder for a filling snack with 10 grams of protein in each bar. Vegan friendly and gluten-free.

peanut butter oat bar with chocolate drizzled on top

  • Why You’ll Love These
  • Oat Bar Ingredients
  • Ready in 30 Minutes
  • Protein Powder Options
  • Storing
  • No Bake Peanut Butter Oatmeal Bars
  • More Protein Bar Recipes

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Get ready for the easiest, quickest, and best peanut butter protein bars around!

Making your own snacks with protein couldn’t be easier with this recipe!

Peanut butter and oats are making up the base of these homemade protein bars today, which means these are definitely going to be a crowd-pleaser.

Why You’ll Love These

  • Quick and easy. This oat protein bar recipe can be made in just one bowl without any fancy equipment.
  • Just 7 ingredients, most you probably already have in your pantry!
  • Vegan friendly when using maple syrup and plant based protein powder.
  • Gluten free using certified gluten free rolled oats.
  • Tastes like healthy dessert! The combination of peanut butter and chocolate will have you thinking these healthy oatmeal bars are dessert.

Oat Bar Ingredients

  • peanut butter – I used a 100% pure peanut butter, nothing added – these tend to be on the drippy side be sure to give the jar a good stir.
  • honey or maple syrup – feel free to use maple syrup to keep this recipe vegan friendly.
  • coconut oil – just a little bit helps set the bars
  • rolled oats – be sure to use rolled oats here, not quick oats, to get the right texture.
  • hemp hearts – these are optional but you could also use flaxseed meal instead.
  • chia seeds – I like adding chia seeds as well for additional fiber and heart healthy fats.
  • protein powder – you can use whey protein, beef isolate protein powder or plant based. If using plant based, you will likely need to add a couple splashes of water and some more coconut oil.
honey, coconut oil, peanut butter, rolled oats, protein powder, chia seeds and hemp hearts in bowls, with text by bowls

Find the full detailed instructions with measurements in the recipe card below, at the end of this post.

Ready in 30 Minutes

These peanut butter oat bars are SO EASY and take about 5 minutes to throw together. You just need some mixing bowls and a parchment lined square baking pan.

Mix Dry Ingredients

In a bowl add together the oats, chia seeds, hemp hearts and protein powder.

side by side image of oat bar ingredients in glass bowl

Mix together wet ingredients

In a medium microwave safe bowl, melt together the peanut butter, honey or maple syrup and coconut oil.

Or use a saucepan on stovetop over low-medium heat.

Combine

Add the peanut butter mixture to the oat mixture until combined, using your hands at the end as necessary to make sure it is evenly mixed.

Press into Pan & Chill

Then press the mixture into your lined baking pan and chill in the fridge for about 45 minutes.

Chocolate Topping

You can add a chocolate topping to these bars for the ultimate healthy treat. Simply microwave some chocolate chips on half power, mix with a little bit of peanut butter and drizzle on the chocolate-peanut butter melty goodness.

chocolate drizzled over peanut butter oat bars

Protein Powder Options

Whey protein powder or beef isolate protein powder can be used, or collagen peptides with no substitutions necessary.

If using plant based protein powder, add a few splashes of water and a little extra coconut oil to help the mixture come together. Plant based protein will absorb liquid more than other kinds.

Storing

These peanut butter protein bars should be stored in the fridge in the fridge, but are fine to set out at room temperature before enjoying.

If freezing, be sure to store in an airtight container, and use within 3-4 months.

bowl of peanut butter next to melted chocolate on spoon, with peanut butter oat bars on board

5 from 8 votes

No Bake Peanut Butter Oatmeal Bars

Prep: 5 minutes minutes
Total: 30 minutes minutes
Making your own protein snack bars couldn't be any easier with this recipe! These quick, no bake Peanut Butter Oat Bars are made with rolled oats, peanut butter, and some protein powder for a filling snack with 10 grams of protein in each bar. Gluten free and vegan friendly.
peanut butter oat bar with chocolate drizzled on top
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Author: Ashley Walterhouse
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Servings 12 bars

Ingredients

for the bars:

  • 2 cups old-fashioned rolled oats
  • 3 tablespoons hemp hearts or flaxseed meal
  • 2 tablespoons chia seeds
  • 1/2 cup protein powder*
  • ¾ cup all natural peanut butter*
  • 1.5 tablespoons coconut oil, melted
  • ⅓ cup + 1 tablespoon raw honey, use brown rice syrup or maple syrup for vegan

chocolate topping

  • 3 tablespoons mini semi-sweet chocolate chips
  • 1/2 tablespoon peanut butter
  • 1 teaspoon coconut oil

Instructions

  • Line 8×8 pan with parchment paper, set aside.
  • In a large bowl, stir together oats, protein powder, hemp hearts and chia seeds; set aside.
    oats, hemp hearts, chia seeds and protein powder in bowl
  • In a medium microwave safe bowl, add peanut butter, coconut oil, and honey. Microwave for 10-15 seconds, and stir until evenly combined. Add to dry ingredients, mixing with hands at the end as needed. Mixture will be thick.
    peanut butter oats mixture
  • Press oat mixture into prepared pan, using hands to press evenly into all corners. Place pan in refrigerator for about 45 minutes to set (or 20 minutes in freezer).
    peanut butter oat bars pressed into square pan
  • Once bars have set, melt chocolate: melt chocolate chips and coconut oil in microwave on half power in 15-20 second intervals. Once completely melted stir in peanut butter until no lumps are present. Drizzle peanut butter chocolate on bars and allow to set, about 15 minutes at room temperature.
    melted chocolate drizzled onto peanut butter oat bars
  • Lift parchment paper from pan and place on cutting board. Using a large sharp knife, cut bars into 12 servings.
    peanut butter oat bars cut into squares with chocolate zigzag on top
  • Store Peanut Butter Protein Oat Bars in airtight container in fridge up to 2 weeks, or in store in freezer for up to 3 months. Enjoy!

Video

★ Last step! If you make this, please leave a review letting us know how it was!

Recipe Notes:

If using plant protein, you may need to add about 2 tablespoons of water or plant milk to help bring the mixture together so it isn’t as dry – plant protein will absorb the dry ingredients differently compared to whey or collagen. And different plant proteins will work differently. Once you start mixing all of the ingredients together, you just want the mixture to be able to hold. Adding a little extra coconut oil will help as well.
Save 15% on Equip Foods protein. Code FITMITTEN.
For the peanut butter I used a “drippy” kind with no added ingredients
Total time includes chill time in freezer.
Nutrition approximate; does not include chocolate topping.

Nutrition Information

Serving: 1bar, Calories: 212kcal (11%), Carbohydrates: 21g (7%), Protein: 7g (14%), Fat: 12g (18%), Saturated Fat: 3g (19%), Polyunsaturated Fat: 1g, Sodium: 72mg (3%), Fiber: 3g (13%), Sugar: 10g (11%)
Like this?Leave a comment below!

More Protein Bar Recipes

  • Chocolate Coffee Protein Bars
  • Chocolate Oat Protein Bars
  • 4-Ingredient Homemade Protein Bars
  • Copycat RXBAR Recipe

If you make this recipe, be sure to leave a comment and review below! It helps others learn more about the recipe and I always appreciate your feedback!

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About

Ashley Walterhouse

Ashley Walterhouse is the founder of Fit Mitten Kitchen, based in the Greater Lansing Area of Michigan, AKA “the Mitten.” Ashley grew up as a picky eater but later discovered that eating healthy was actually easy and fun. She started FMK in 2015 as a way to share her newfound love of developing healthier recipes for all to enjoy.
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5 from 8 votes

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Recipe Rating




69 responses

  1. Britney
    April 21, 2016

    Made these a few days ago and they are all devoured already! I used Vega protein powder and it turned out fab!

    Reply
    1. Ashley
      April 21, 2016

      Ah yay! So glad you love them 🙂 and thanks so much for letting me know about the Vega protein! I haven’t quite gotten around to trying my plant protein with these yet.

      Reply
  2. Melissa
    April 16, 2016

    Do you think these would still taste decent with either half the honey to reduce the carbs or do you think the texture would turn out the same using maple syrup?
    They look super yummy, but the carb to protein ratio is a bit high for my needs. Trying to find a way to reduce the carb count but keep protein count higher! Suggestions?

    Reply
    1. Ashley
      April 20, 2016

      Hey there! If you’re looking to reduce carbs, I think you’re going to need to do a combo of reducing both the honey as well as some of the oats in order to keep the texture similar. If I were looking to reduce the carbs I would personally try just 1/4 cup of honey, and maybe try reducing the oats 1/4 cup as well? So 1 +3/4 cups of oats total. If the mixture seems a little dry without adjusting the other wet ingredients, try adding in 1 TBS of liquid at at time. Let me know how it goes! P.S. If you’re looking for a particular ratio/set of macros, I would love to see what I can do for a future recipe. Feel free to email me [email protected] 🙂

      Reply
  3. Jess @hellotofit
    April 3, 2016

    Oh heeeey! These look JUST as fantastic as the lovely bars you made for my site. GAH. I’ve noticed that when I make snacks ahead of time, adding chia seeds is a MUST! Well…besides nut butter 😛

    Get ready for some comments on comments on comments! <3

    Reply
    1. Ashley
      April 3, 2016

      lol yesssss <3

      Reply
  4. Rachel
    April 2, 2016

    Love this mixture! I make a protein ball recipe similar to this every week to have on hand but the problem is that they usually only last like 2 days because they’re so tasty…lol

    Reply
    1. Ashley
      April 3, 2016

      Lol right?! Make a quadruple batch and freeze em 🙂

      Reply
  5. Natalie @ A Fit Philosophy
    April 2, 2016

    5 stars
    Oh WOWzzaaa! When can I sign up for your oat bar deliveries???? YUMMM!

    Reply
    1. Ashley
      April 3, 2016

      Haha maybe one day! 😉

      Reply
  6. Mel @ The Refreshanista
    April 2, 2016

    Ohhhh yummy! I love that chocolate PB drizzle on top! I gotta make these 🙂

    Reply
    1. Ashley
      April 3, 2016

      I hope you do Mel! They’re such a good snack. Thank you for stopping by 🙂

      Reply
  7. Chrissa – Physical Kitchness
    April 1, 2016

    Shut your face, 5 minutes?! I can like DO 5 minutes!!!

    Reply
    1. Ashley
      April 3, 2016

      It’s crazy easy and you must make! I made the chocolate ones again and they’re so gooooodd

      Reply
  8. Emily Weir
    April 1, 2016

    These look SO good. Definitely going to give them a try this next week. I much prefer the option of making my own protein bars to spending so much money buying them.

    Reply
    1. Ashley
      April 3, 2016

      Thanks Emily! I agree, I feel like finding a good store-bought bar can be such a trial and error process sometimes. When you find a homemade recipe that works, it’s easy! Would love to hear if you give em a try 🙂

      Reply
  9. Samantha @ What’s Up, USANA?
    March 29, 2016

    These look so good! Will have to give them a try. I’ve been needing something to snack on in the middle of my work day and this sounds perfect 🙂

    Reply
  10. Caroline
    March 29, 2016

    These look amazing! And super easy to make. Your photography is great – what kind of camera + lens do you use?? XOXO

    Reply
  11. Kristy @ Southern In Law
    March 28, 2016

    I love making homemade protein bars and these look SO good! Especially with that chocolate drizzle! <3

    Reply
    1. Ashley
      March 28, 2016

      Can never go wrong with more chocolate! Thanks Kristy 🙂

      Reply
  12. Chelsea @ Healthy Fabulous Life
    March 28, 2016

    Love the chocolate drizzle on these! I’m always looking for new bar recipes!!

    Reply
    1. Ashley
      March 28, 2016

      Thanks Chelsea, hope you give em a try! 🙂

      Reply
  13. Megan @ Skinny Fitalicious
    March 28, 2016

    YUM! I need these bars. How do you get your chocolate swirls so pretty too? Haha…mine always come out looking like a 4 year old did it.

    Reply
    1. Ashley
      March 28, 2016

      lol my OCD tendencies :-p

      Reply
  14. Rebecca @ Strength and Sunshine
    March 28, 2016

    The topping is never optional…never!! Hahaha! <3
    These look super good Ashley! Totally would love it if you'd send me some? Okay thanks! 😉

    Reply
    1. Ashley
      March 28, 2016

      Haha, true!

      Reply
  15. Ashlyn // Dollop Of Yum
    March 28, 2016

    Yum, these look amazing! Need to get in the habit of making protein bars more often and I’m definitely going to have to try out this recipe. 🙂

    Reply
    1. Ashley
      March 28, 2016

      I hope you do! They don’t even taste like protein bars. When I made the chocolate one’s for Hello to Fit, my husband ate two right in a row and I think he thought they were dessert… lol

      Reply
  16. Brie @ Lean, Clean, & Brie
    March 28, 2016

    Okay…. that DRIZZLE makes me want to make these bars right about now. When in doubt, add more peanut butter is my motto 😉

    Reply
    1. Ashley
      March 28, 2016

      I just ate my last one yesterday and thinking about whipping up another batch right NOW 😀

      Reply
  17. Pragati // Simple Medicine
    March 28, 2016

    These look amazing. I might need to make a batch for this week. I’ve been struggling with protein snack ideas; my go-to’s are getting boring!

    Reply
    1. Ashley
      March 28, 2016

      Ah I hope you make them! They are so tasty 🙂 I’d been getting a little tired of my other base so these are definitely a new favorite.

      Reply
  18. rachel @ athletic avocado
    March 28, 2016

    Love the extra PB you snuck in there! Can never have too much 🙂 Also that thickness <3

    Reply
    1. Ashley
      March 28, 2016

      heehee, thanks Rachel!

      Reply
  19. Erin @ The Almond Eater
    March 28, 2016

    Ohhhh girl look at that peanut butter!! Sometimes, you gotta make a recipe AGAIN… Pretty much every time I make muffins it’s the same recipe just a different flavor. After all, why change something that works?

    Reply
    1. Ashley
      March 28, 2016

      AGREE. No need no need <3

      Reply
  20. Christina
    March 28, 2016

    5 stars
    Yummmm I used to make bars like this all the time. Totally using this recipe to make them again! I’ve been dying for some protein bars, might as well make my own!

    Reply
    1. Ashley
      March 28, 2016

      You won’t be disappointed 😉

      Reply
      1. Randi Field
        August 13, 2017

        Hello Ashley, do you happen to have all the nutritional information on the recipe?
        Calories, carbs, sodium, fat saturated.. I could figure it out but if you had a rough idea that would be great:)

        Thank you for sharing <3

        Reply
        1. Ashley
          August 14, 2017

          Hi Randi – I do actually have approximate nutrition info for this one. 1/12 (1 bar of 12 servings) 237 calories. 14g fat. 4g saturated fat. 7mg cholesterol 18mg sodium. 21g carbs. 3g fiber. 10g sugar. 10g protein. Again, that is approximate based on the ingredients I used – unsalted and no sugar added peanut butter, high quality vanilla whey protein powder, etc. Hope that helps!

          Reply
          1. Randi Field
            August 17, 2017

            thank you so much for the quick reply. I have tried these and modified them a bit, but the idea is genius. Thank you and i wish you all the success!

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Hey there!

I’m Ashley – I started Fit Mitten Kitchen in 2015 to share healthier recipes. Here we balance real food with desserts and healthy snacks making life easy, nutritious and delicious.

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