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Home » Recipes » Baking

Oatmeal Rhubarb Bars

Updated: May 26, 2026 · Published: Jun 28, 2024 by Danika Vanderpyl · This post may contain affiliate links · 8 Comments

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Beautiful and wholesome strawberry rhubarb oat bars, perfect for early summer. These delicious oatmeal rhubarb bars are made with less sugar but more flavour from a simple homemade strawberry rhubarb jam and a crisp-like crust!

After testing again and again, I created this dreamy bar with the perfect crispy oat crust all while being moist and flavorful! If you love the rhubarb strawberry flavor combo 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 oatmeal rhubarb bars
  • Danika's tips
  • Other wonderful rhubarb recipes
  • Oatmeal Rhubarb 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 the different tones of pink, and they taste vibrant too. They would be perfect for a brunch or a baby shower!

I am very happy with how these oatmeal rhubarb 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, but I think it makes these bars incredible. 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.
  • Coconut oil: If you don't have coconut oil, melted butter can be used!

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 healthy detoxification. With lower sugar and higher fiber this recipe was made with your blood sugar levels in mind.

Strawberries and rhubarb are good sources 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 oatmeal rhubarb bars

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.

    1. Preheat the oven to 350 degrees. Rhubarb & Sugar: Mix half of the rhubarb with 1 tablespoon of sugar to soften.

    A pot of rhubarb and chia  seeds.

    2. Rhubarb Jam: Place the remaining rhubarb and sugar with the 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; it should be the consistency of applesauce.

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

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

    Crust pressed into a 8x8 pan.

    4. 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 oats until it is even.

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

    5. 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.

    6. 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 of a similar size, and it looked cool.

    Danika's tips

    Cut 1 ½ cups of rhubarb at an angle to make pretty slices of rhubarb and use this for layering on top of the rhubarb strawberry jammy layer.

    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.

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

    Other wonderful rhubarb recipes

    If you have more rhubarb in your garden, try these recipes next! This blog is dedicated to wholesome treats and snacks I make for my family and I share only the best ones.

    • 4 photos of bright pink rhubarb snacks.
      Rhubarb Snacks
    • A white and red popsicles with strawberries and rhubarb behind it.
      Rhubarb Popsicles
    • Bright pink smoothie in a glass cup with rhubarb beside it.
      Rhubarb Smoothie
    • Cookies with oats on cooling rack with rhubarb beside them.
      Rhubarb Oatmeal Cookies
    See more Rhubarb Recipes →

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

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

    Oatmeal Rhubarb 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 4 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 rhubarb *divided, and chopped
    • 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 coconut oil, melted OR melted butter
    • 1 egg

    Instructions
     

    • Preheat the oven to 350 Fahrenheit (175 C).
      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, melted coconut oil, and an egg. Line an 8x8 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 Fahrenheit (175C) for 30 minutes. Serve warm or at 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

    Serving: 1barCalories: 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 →

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    Comments

      5 from 4 votes

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      Recipe Rating




    1. Michaella Lessmeister says

      May 29, 2026 at 8:11 am

      5 stars
      I love this recipe! I keep coming back to it because I love rhubarb and always have some in the freezer! Super simple and delicious!

      Reply
      • Danika Vanderpyl says

        June 01, 2026 at 11:25 am

        I'm glad you love this recipe and think its delicious and amazing! Thanks for letting me know!

        Reply
    2. 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
    3. 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
    4. 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
    5. 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

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