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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!

Ashley Walterhouse Avatar

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. Kelly G
    September 9, 2024

    It would be great to be able to print this recipe without the photos in the recipe. The images still remain even after de-selecting to print with images.

    Reply
    1. Ashley
      September 9, 2024

      Hi Kelly, Thanks so much for the feedback here! I will definitely look into this setting and see what can be done. This change may take a few days or so but I will try to have my developer team implement ASAP.

      Reply
  2. Krysta
    September 5, 2023

    5 stars
    One of my favourites

    Reply
    1. Ashley
      September 5, 2023

      Thank you for sharing, Krysta! One of my favorites too 🙂

      Reply
  3. Bridget Turner
    August 5, 2022

    5 stars
    Loved this recipe! I’ll be making this again 🙂 great for long days on the beach teaching as a surf instructor.

    Reply
    1. Ashley
      August 22, 2022

      Thank you for coming back to leave a review! (And how fun – a surf instructor!)

      Reply
  4. Kathleen B
    July 26, 2022

    5 stars
    These were delicious. I only had sun butter, so I subbed that for the peanut butter. I look forward to making these again!

    Reply
    1. Ashley
      July 27, 2022

      Awesome! Thanks so much for your review!

      Reply
  5. Lauren Klein
    April 18, 2020

    5 stars
    These were SO SIMPLE and DELICIOUS!! Easily a new staple in my house

    Reply
  6. Linda Kerris
    December 10, 2018

    Omg, these are fantastic! I do meal prep every week so I’m alway scouring the internet for various recipes. These will become a regular thing for me and my clients!

    Reply
    1. Ashley
      December 11, 2018

      So glad you love them, Linda! Thanks so much for taking the time to comment and share here 🙂

      Reply
  7. Liv
    July 23, 2018

    Do you have any suggestions to substitute out the coconut oil? Want to try these but don’t have the oil at home!

    Reply
    1. Ashley
      July 23, 2018

      You should be fine to sub with another oil actually! I just made these recently and subbed with sunflower oil because I’m sensitive to coconut right now 🙂

      Reply
  8. Mary Lee Lux
    June 19, 2018

    I like the idea of the topping but I don’t have peanut flour can 1 tablespoon of peanut butter be used instead of the peanut flour.

    Reply
    1. Ashley
      June 19, 2018

      Hi Mary, You could likely mix in Peanut butter but probably only 1/2 Tablespoon with the chocolate chips when melting. I don’t think you need a full tablespoon here. Or you can just stick with a melted chocolate topping. Hope that helps!

      Reply
  9. Anne
    March 10, 2018

    My husband and I love these. You have to have exactly the right peanut butter or else they are crumbly.

    Reply
  10. Jenna
    October 26, 2017

    Just finished making these!! omg they are awesome and super easy. I added melted dark chocolate on top. I even think next time i will add shredded coconut to the mixture.
    Thanks for the awesome recipe!

    Reply
    1. Ashley
      October 26, 2017

      Hi Jenna, so glad you love the bars and thanks for your feedback! I appreciate you taking time to stop by and leave a comment – it means a lot 😀

      Reply
  11. Anthony
    October 8, 2017

    Will they melt or get disfigured if i take them out in room temperature because i plan on bringing them to work

    Reply
    1. Ashley
      October 8, 2017

      They should stay pretty well together! Room temp should be fine, just don’t let them sit out in the heat 🙂

      Reply
  12. Nyla
    September 15, 2017

    How many carbs and protein

    Reply
    1. Ashley
      September 16, 2017

      Hi there Nyla, nutrition information is going to be approximate, and will vary depending on products and protein powder used. But roughly 1/12 of the recipe is : Calories 240. Fat 14. Carbohydrates 21. Sugar 10. Fiber 3. Protein 10.

      Hope that helps!

      Reply
  13. Brandy Smelcer
    September 9, 2017

    These are my go to bars for my kids and husband. He loves to take these hunting…I ended up adding coconut flakes, smashed up pretzels, and sometimes peanut M&M’s on my last batch. I also use vegan protein powder. THANK YOU!

    Reply
    1. Ashley
      September 10, 2017

      Yay so glad you love them! Thank you so much for your comment 🙂 I love the addition of pretzels and m&ms –My husband would love that!

      Reply
  14. Alison
    March 13, 2017

    5 stars
    Yum! And every family member loved too! I used vegan protein powder (TJ’s pea protein powder) as that’s what I had on hand. Also put the choco chips inside to help encourage my son.

    Love what you do and want to make everything!! Keep up the amazing recipes, positivity and humor!

    Reply
    1. Ashley
      March 14, 2017

      Wow thank you so much for your comment Alison! I am so glad your whole family enjoyed them 🙂 And thank you for your kind words! They truly mean so much 🙂 Let me know if you make anything else!

      Reply
  15. Pal
    August 23, 2016

    5 stars
    I’m so far behind on my blog comments, bud. These are TREMENDOUS. Really SO tasty. I used flax instead of hemp hearts and they turned out perfect. Yesterday I asked Andy how his lunch was and he said “Those protein bars are really, seriously good.” 😀

    Reply
    1. Ashley
      August 23, 2016

      lol YAY. They’re so simple too! Glad Andy enjoyed 😀 ly <3

      Reply
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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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