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Home » Recipes » Snacks

High Fiber Protein Bars – Healthy, Homemade Recipe

Published: Mar 3, 2023 · Last Modified: Feb 9, 2025 by Haylee Jane Monteiro · This post may contain affiliate links

Soft and Chewy High Fiber Protein Bars packed with flavor and nutrition. Healthy homemade protein fiber bars use oats, chia seeds, flax seeds and a high-fiber cereal!

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Soft and Chewy High Fiber Protein Bars packed with flavor and nutrition. Healthy homemade protein fiber bars use oats, chia seeds, flax seeds and a high-fiber cereal!

Now I’m not talking 20g of fiber in one bar here, because that really would be too much. We want to feel full, but not poop in another 10 minutes, haha (okay it wouldn’t be 10 mins, but you know what I mean ?).

The fiber in these bars keeps you full a little longer, and also helps you meet that daily fiber goal of at least 25-30. Not too massive a bar here that it replaces a meal, but just something to snack on or maybe as a simple dessert.

Ingredients for High Fiber Protein Bars:

These high fiber protein bars are made with simple healthy ingredients with no extra sugar, and great for a quick homemade snack.

  • Oat Flour – You can make your own by blending rolled oats in a high speed blender
  • High Fiber Cereal – I used Fiber One
  • Chia Seeds
  • Flax Seeds
  • Vanilla Protein Powder for high protein fiber bar recipe. I recommend the Quest Vanilla .
  • Unflavored Protein Powder to replace some of the flour (and carbs) in the recipe for a slightly lower carb high protein snack recipe. I recommend the Multi-purpose mix protein powder from Quest Nutrition.
  • Unsweetened Almond Milk
  • Sweetened Peanut Butter I used Grandma’s PB Fudge flavor Almond Butter from American Dream Nut Butter.
    It’s lower fat and higher protein than normal, and just amazing (code HAYLSKITCHEN gives you a discount on these) in this protein bar recipe.
    ADNB has a lot of other flavors that would go well here too. 

And a white chocolate topping here for these protein bars.

  • White Chocolate Chips – I use sugar free white chocolate chips from Lily’s here for the contrast.
    But another sugar free regular chocolate chip option is Lakanto (same discount here too) or Lily’s!
  • A bit of Coconut Oil
Soft and Chewy High Fiber Protein Bars packed with flavor and nutrition. Healthy homemade protein fiber bars use oats, chia seeds, flax seeds and a high-fiber cereal!

How to make Fiber Bars with Protein Powder

These homemade protein fiber bars are super easy to make – just mix all the ingredients in a bowl, press into a pan, and then cut!

  1. Combine all the dry ingredients in a bowl –
  1. Add in the peanut butter and milk (little at a time) and mix!
    Add milk little at a time. Too much at once will make the mix too runny.
  1. Press down into a parchment-lined loaf pan.
  1. Chill in the freezer for about 10 minutes, then slice into bars.
    You can slice immediately, but freezing makes them hold shape better.
  1. Melt chocolate in the microwave with a bit of coconut oil.
    Melt in intervals of 15 seconds, stirring every now and then so it doesn’t burn.
    Drizzle on the bars.
Soft and Chewy High Fiber Protein Bars packed with flavor and nutrition. Healthy homemade protein fiber bars use oats, chia seeds, flax seeds and a high-fiber cereal!

To store Homemade Protein Fiber Bars

These healthy protein fiber bars can be stored on the counter top for a few hours, or in the fridge for 4 days; Use an airtight container. 

You can also freeze these high fiber protein bars in airtight sealed container, or individually wrapped in plastic wrap and placed in zipper bag; Fiber snack bars should keep for 2 or 3 months. Be sure to let them thaw on the counter before eating!

Alternatives for Healthy Fiber Bars Recipe!

I would recommend making this recipe with the ingredients (and brands) listed, but here’s some options for a healthy homemade fiber protein bar:

  • Unflavored Protein Powder: Oat Flour or Almond Flour, but use less milk;
  • Peanut Butter: Almond Butter, Cashew Butter or any other
  • Almond Milk: Any other milk
  • White Chocolate: Use milk or dark chocolate chips –  Lakanto for a sugar free option again (code HAYLSKITCHEN for the discount) – instead.

Vegan Fiber Protein Bars

You can easily make these high-fiber protein bars Vegan with the right ingredients; Use a plant based protein powder and fiber cereal. Also be sure to top with dairy-free chocolate!

Gluten Free High Fiber Protein Bars

Use gluten free oats, cereal and protein powder for a gluten free high fiber protein bar recipe.

More High Fiber Protein Powder Recipes:

  • PB&J Protein Mug Cake – Easy Dessert for One!
  • Peanut Butter Protein Brownie for One
  • Half Baked Oreo Protein Fudge Brownie
  • Caramel Protein Balls

More Easy Homemade Protein Bars to try!

  • Birthday Cake Protein Bars
  • Fererro Rocher Protein Bar
  • Snickers Protein Bar
  • Biscoff Protein Bar

High Fiber Protein Bars – Healthy, Homemade Recipe

5 from 2 votes
Print recipe Pin Recipe
Prep Time10 minutes mins
Chill Time:10 minutes mins
Total Time10 minutes mins
Servings: 6 bars
Calories: 136kcal
Course: Snack
Cuisine: American
Soft and Chewy High Fiber Protein Bars packed with flavor and nutrition. Healthy homemade protein fiber bars use oats, chia seeds, flax seeds and a high-fiber cereal!

Ingredients

  • ½ cup High Fiber Cereal, 30g, e.g. Fiber One
  • ¼ cup Instant Oats, 30g
  • ¼ cup Vanilla Protein Powder, Whey-casein, 22g
  • 2 tablespoon Unflavored Protein Powder, Whey-casein, 11g, see post for subs
  • ¼ cup Flaxseed Meal, 26g
  • 1 tablespoon Chia Seeds, 12g
  • ¼ cup Unsweetened Almond Milk, 60ml
  • 3 tablespoon Peanut Butter, 48g, Sweetened recommended below

Topping:

  • ½ tablespoon White Chocolate Chips, Sugar-free recommended below, 7g
  • Bit of Coconut Oil

Instructions

  • Line an 8×4” loaf pan with parchment paper; leave an overhang to lift out later.
  • Combine dry ingredients in a bowl – cereal, oats, vanilla protein powder, unflavored protein powder, flax seeds and chia seeds.
  • Add in peanut butter and milk – little at a time – and mix. Mixture will be like a dough.
  • Transfer to prepared pan and press down.
    Optional: Place in freezer 10 minutes to harden.

Topping:

  • Lift mixture out of pan, slice into 6 bars.
  • Place chocolate chips in a bowl, add in a bit of coconut oil, and microwave at 10 second intervals (stirring) until melted.
  • Drizzle over bars.

Notes

  • Nutrition value is calculated using products recommended below.
  • See post for alternate ingredients, tips and storage options.
Product Recommendations:
  • Quest Nutrition Vanilla Whey-Casein Protein Powder
  • Quest Nutrition Multi-purpose Mix (Unflavored) Whey-Casein Protein Powder
  • American Dream Nut Butter Peanut Butter (Grandma’s PB Fudge)
    • Use code HAYLSKITCHEN for a discount off your order
  • Lily’s White Chocolate Baking Chips
Nutrition:
  • Servings: 6 bars | Serving size: 1
  • Calories: 136kcal
  • Fat: 6.6g | Saturated fat: 0.9g
  • Carbohydrates: 11.9g | Fiber: 5.4g | Sugar: 0.6g
  • Protein: 9.8g

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  • Lemon Blueberry Protein Bars – Real Amazing Vegan Recipe!
  • High Protein Pumpkin Spread – Easy Fall Perfection!

Comments

  1. Katie says

    April 11, 2024 at 7:22 pm

    5 stars
    Made for my 2 year old to help relieve her constipation. She loved the bars and it’s done wonders for her GI tract. Thanks for the recipe.

    Reply
    • Haylee Jane Monteiro says

      August 08, 2024 at 11:28 pm

      Oh my gosh I have tears <3 So glad you trusted this recipe for your baby girl! Baby taste buds approved haha

      Reply
  2. San says

    August 09, 2023 at 11:28 pm

    5 stars
    Love this recipe! I baked them for crunchier texture. ? Now I have a more healthy and budget friendly option for my pre-workout snacks!

    Reply
    • Haylee Jane Monteiro says

      August 14, 2023 at 2:19 am

      Oohh! I love the idea of baking these high fiber protein bars. A must-try for me here! And budget-friendly for sure!

      Reply

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Hi, I'm Haylee!

I use my passion for baking (and my sweet tooth) to create healthy, high protein, low fat and sugar free desserts and sweet treats that are actually delicious.

Come join me in Hayl's Kitchen and let's eat high protein, sweet and guilt free!

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