Beside the Mountain

  • All Recipes
  • About
  • My Pantry
menu icon
go to homepage
  • All Recipes
  • About
  • My Pantry
subscribe
search icon
Homepage link
  • All Recipes
  • About
  • My Pantry
×
Home » Recipes » Baking

Oatmeal Rhubarb Bars

Updated: Nov 5, 2024 · Published: Jun 28, 2024 by Danika Vanderpyl · This post may contain affiliate links · 6 Comments

Jump to Recipe Print Recipe

A beautiful and wholesome strawberry rhubarb oat bar - perfect for early summer.

After testing again and again I created this dreamy bar with the perfect crispy oat crust all the while being moist and flavorful! If you love rhubarb these days...also try my other rhubarb snacks, yogurt popsicles and these delicious homemade fruit roll-ups!

Rhubarb slices on top of strawberry sauce on an oat crust in a square pan.
Jump to:
  • Why you will love this recipe
  • Ingredients needed
  • Danika's quick nutrition tip
  • Step-by-step instructions for healthy muffins
  • Tips from my experience
  • How do you store strawberry rhubarb oat bars?
  • Other delicious wholesome recipes to try
  • Rhubarb Oat Bars
  • Danika Vanderpyl, C.H.N

Why you will love this recipe

  • The strawberry rhubarb combo is incredible and the crust has almond extract which I think is my favorite part.
  • I would consider these healthy rhubarb bars, they are low in sugar, high in fiber, naturally dairy free, and full of vitamins from the fruit!
  • These bars are so pretty with all different tones of pink, and they taste vibrant too!

I am very happy with how these bars turned out now, not too sweet, with juicy summer fruit, and a wholesome oat crust!

Ingredients needed

Ingredients measured out for rhubarb oatmeal bars with labels.

Helpful notes about ingredients needed:

  • Oats: Rolled oats or quick oats can be used.
  • Flour: Whole wheat or white flour can be used.
  • Almond extract: If you don't like almond extract flavor or you don't have it you can omit it. You could use 1 teaspoon of cinnamon to add a burst of flavor instead.
  • Brown sugar: Use brown sugar or maple syrup to sweeten the crust.

See recipe card below for exact ingredient quantities.

Danika's quick nutrition tip

I like to share simple insights from my schooling in Holistic Nutrition. Let's chat about rhubarb bars with oatmeal!

Fiber: The oats, whole wheat flour, and rhubarb all contain higher amounts of fiber supporting your intestinal tract and blood sugar levels.

Strawberries and rhubarb are good source of vitamin C, vitamin A, and potassium.

Do note, that rhubarb should be eaten in moderation due to the high levels of oxalic acid. If you struggle with inadequate calcium absorption be mindful of this.

Step-by-step instructions for healthy muffins

Follow the photos from my kitchen to make these rhubarb squares with oatmeal. Scroll down to see the recipe card for exact ingredient details.

A measuring cup of rhubarb and a tablespoon with sugar in it.

Preheat the oven to 350 degrees F.

Rhubarb & Sugar: Mix half of the rhubarb with 1 tablespoon of sugar to soften.

A pot of rhubarb and chia  seeds.

Rhubarb Jam: Place the remaining rhubarb, sugar, strawberries, chia seeds, and water in a medium pot. Boil together, stirring regularly for about 7 minutes until everything is soft and thick. Boil a little longer if it seems watery until it becomes the consistency of applesauce.

Oats, flour, sea salt, egg, sugar in a glass bowl.

Oat Crust: In a mixing bowl stir together the oats, flour, sea salt. Add the egg, almond extract, coconut oil, and brown sugar (or maple syrup). Mix well.

Crust pressed into a 8x8 pan.

Press into pan: Prepare a 9x9 pan by lining it with parchment paper. Dump the oat base into the lined pan, spread and press the oat until it is even.

An 8x8 pan with strawberry rhubarb sauce on top of an oat crust.

Add rhubarb strawberry sauce: Spread the warm rhubarb chia mixture all over the oatmeal base.

Rhubarb slices on top of strawberry rhubarb sauce in an 8x8 pan.

Arrange the rhubarb: Using the rhubarb that was mixed with sugar, place it on top of the rhubarb jam layer. I placed mine in long rows with pieces that were all similar sizes and it looked cool.

Tips from my experience

Cut 1 ½ cups of rhubarb slanted to and use this for layering on top to make the bars look pretty!

The rhubarb jam layer needs to be thick, let it boil until there is not too much wetness and it's a thicker consistency, similar to applesauce.

I like the taste of rolled oats and maple syrup the best however quick oats and brown sugar can be used in a pinch.

How do you store strawberry rhubarb oat bars?

I keep my rhubarb bars on the counter if I'm going to serve them in the next day or so. I will place them in the fridge for up to 4 days if we don't plan to eat them right away. Or else I cut them and place them in my freezer where they will last about 6 months.

A toddler grabbing a pink rhubarb oatmeal bar from a square pan.

Other delicious wholesome recipes to try

For more rhubarb goodness: Try this delicious rhubarb smoothie and these moist banana rhubarb muffins!

  • A brown moist bar with pieces of oats and chocolate chips visible stacked on two other bars with a bite out of the top protein bar.
    Banana Oat Protein Bars
  • Light brown oatmeal apple cookies on a parchment paper on a plate with an apple beside it.
    Apple Oatmeal Raisin Cookies
  • A close up of a quinoa egg bite with a orange banana pepper on top with kale around it.
    High Protein Quinoa Eggs Muffins
  • A light orange muffins with red cranberries poking through on a little plate with orange slices behind it.
    Hemp Heart Muffins with Fresh Cranberry Orange (High Protein)

I want to hear if you made these rhubarb strawberry oat bars! Please leave a star review and share what you thought! I read every comment, and it helps others make this recipe.

Bright pink squares of oat bars with rhubarb slices on top.

Rhubarb Oat Bars

Danika Vanderpyl
Moist delicious rhubarb strawberry bars that are low in sugar. Fresh or frozen strawberries and rhubarb can be used for this recipe.
5 from 3 votes
Print Recipe Pin Recipe
Prep Time 25 minutes mins
Cook Time 30 minutes mins
Total Time 55 minutes mins
Course Dessert, Snack
Cuisine American
Servings 16 bars
Calories 155 kcal

Equipment

  • 1 9x9 pan

Ingredients
  

  • 3 tablespoons sugar *divided
  • 3 cups chopped rhubarb *divided
  • 1 ½ cup strawberries frozen or fresh
  • 2 teaspoon chia seeds
  • ½ cup water

Dry Ingredients

  • 1 ½ cups quick oats or rolled oats
  • 1 cup whole wheat flour
  • ¼ teaspoon sea salt
  • ½ teaspoon almond extract
  • ⅓ cup maple syrup OR brown sugar + 3 tablespoon water
  • ½ cup melted coconut oil
  • 1 egg

Instructions
 

  • Preheat the oven to 350 F.
    Start by mixing 1 ½ cup chopped rhubarb with 1 tablespoon of sugar, then set aside to soften. Now place the remaining 1 ½ cups of rhubarb in a medium pot with the strawberries, chia seeds, the remaining 2 tablespoons of sugar, and water. Boil for about 7 minutes, stirring regularly until the mixture is thick and everything is soft. Using a fork mash the strawberries and rhubarb. Cook longer if this mixture seems watery.
  • In another bowl place the oats, whole wheat flour, and sea salt, and mix together well. Add the almond extract, maple syrup (or brown sugar + water), melted coconut oil, and an egg. Line a 9x9 pan with parchment paper and press this crust into the pan.
  • Spread the rhubarb strawberry sauce evenly on top of the oats in the pan. Then arrange the rhubarb-sugar pieces on top. Bake at 350 F for 30 minutes. Serve warm or room temperature, eat within 2 days, or cover bars and keep them in the fridge for 4 days.

Notes

See the blog post above for step-by-step photos.
Make Faster: To prep this recipe faster skip setting aside 1 ½ cups of rhubarb and 1 tablespoon of sugar for the top layer, and add this rhubarb and sugar to the pot to boil with the other fruit.
Almond Extract: If you do not like almond extract you can omit it and use 1 teaspoon of cinnamon instead for a delicious flavor. 
Flour: Whole wheat or white flour will work for this recipe. 
Freeze: These bars freeze well, store them in a ziplock bag or a sealing container and freeze for up to 6 months.

Nutrition

Calories: 155kcalCarbohydrates: 20gProtein: 3gFat: 8gSaturated Fat: 6gPolyunsaturated Fat: 1gMonounsaturated Fat: 1gTrans Fat: 0.001gCholesterol: 12mgSodium: 43mgPotassium: 163mgFiber: 2gSugar: 7gVitamin A: 42IUVitamin C: 10mgCalcium: 41mgIron: 1mg
Keyword healthy rhubarb recipe, Low Sugar, Strawberries, Strawberry Rhubarb, whole wheat flour oat bars
Did you love this recipe?Make sure to leave a comment below!
danika sitting in a chair

Danika Vanderpyl, C.H.N

I create snack recipes with healthy ingredients that are mostly already in your kitchen. I'm certified in Holistic Nutrition and I care about giving my kids real food. Let me share my nutrient-dense easy snacks with you.

Learn more about me →

More Baking

  • A dark muffin with coarse sugar on top with a little rosemary beside it.
    Gingerbread Pumpkin Muffins
  • Brown and light brown swirl cookies on a cooling rack.
    Healthy Cinnamon Cookies (Soft & Chewy)
  • A light colored muffins with a lot of chocolate chips poking out of it, sitting on a brown napkin, with other chocolate chip muffins around it.
    Whole Wheat Chocolate Chip Muffins
  • Chocolate Carrot Muffins

Comments

    5 from 3 votes

    Leave a Reply Cancel reply

    Your email address will not be published. Required fields are marked *

    Recipe Rating




  1. Jesse says

    September 25, 2024 at 11:21 am

    5 stars
    Absolutely incredible! Great snacks for on the go and easy to make! If you take them to a gathering you won’t take any home.

    Reply
  2. Stephanie says

    September 23, 2024 at 9:37 am

    5 stars
    Wow, so delicious! This is my new favourite way to use rhubarb and will probably be my go-to recipe from now on. Everyone loved it! I may try using oat flour in the crust next time so that the gluten free people can enjoy it too.

    Reply
    • Danika Vanderpyl says

      September 23, 2024 at 1:54 pm

      Thank YOU for sharing what you thought of these bars Steph! And let me know what you think of just using oat flour. 🙂

      Reply
  3. Danika R says

    July 02, 2024 at 11:23 am

    5 stars
    This was so yummy! Perfectly tart. I only had an 8x8 pan instead of 9x9 so they were a little thicker and took longer to bake of course. Leftovers? Nope. They disappeared. I might try again with butter instead of coconut oil as I just don't love the coconut taste.

    Reply
    • Danika Vanderpyl says

      July 11, 2024 at 5:25 am

      Danika thank you for taking the time to share what you thought of these bars!!! <3

      Reply
  4. Danika Vanderpyl says

    June 28, 2024 at 6:17 am

    Reply
Danika-vanderpyl-hiking-with-mountains

Hey hey! I'm Danika.

I'm certified in holistic nutrition and I create snack recipes! Because unprocessed, wholesome, nutrient-dense snacks are hard to find but I want everyone to know they are easy to make!

About me

Popular

  • A bite out of a chocolate energy balls with specs of ground oatmeal and a flecks of dried rose.
    Banana Chocolate Balls
  • Light brown energy ball with flecks of dates and oats, sitting on red and green apples.
    Apple Cinnamon Bites
  • A light brown smoothie with tahini swirled into it with a sprinkle of cinnamon of top.
    Incredible Quinoa Smoothie (with cooked quinoa)
  • Sliced oat granola bars in a square metal pan on a tile table.
    Chewy Granola Bars with Dates

Footer

↑ back to top

Info

  • About
  • Contact
  • Work With Me
  • Privacy Policy

Newsletter

  • Sign Up! for snack recipes and inspo

Recipes

  • Smoothies
  • Adventure Friendly Snacks
  • Baking
  • No Bake

Copyright © 2025 BesidetheMountain

As an Amazon Associate, I earn from qualifying purchases.

Rate This Recipe

Your vote:




A rating is required
A name is required
An email is required

Recipe Ratings without Comment

Something went wrong. Please try again.