Recipe | Blueberry Oat Bars

recipe blueberry oats crumble breakfast bar

I’ve been meaning to do a recipe post on blueberry oat bars for a while and finally got around to baking them last weekend! The first time I made these, my friends absolutely loved them. Thanks to the gorgeous purpley-blue hue from the blueberries, they are very impressive looking (and even more impressive tasting!), but suuuuper easy to make.

blueberry oatmeal breakfast crumble bar recipe

I cut out some of theย sugar from the original recipe, because I like my blueberry bars a bit less sweet and more tangy. It works great as a breakfast bar or a snack to go with your afternoon pick-me-up. I’ve personally been having mine as a post-dinner dessert. May or may not have eaten one every single night for the past week… but hey, blueberries and oats are healthy….. riiiightttt??

blueberry oatmeal breakfast crumble bar recipe

Tip: Pack down the oat layer with your fingers. So much more effective than using a spatula! ๐Ÿ™‚

blueberry oatmeal breakfast crumble bar recipe

One of my fave things about this recipe is how simple the ingredients areโ€” you probably already have most in your pantry! I have a bunch of leftover blueberries in the freezer now, which means I will 95% be making these again very, very soon.

blueberry oatmeal breakfast crumble bar recipe

You can’t tell from these photos (sneaky photography skills?!), but I don’tย own a baking pan small enough for this recipe. I was too lazy to double the recipe, so I just used aluminum foil to create a makeshift edge…heh. And in case your wondering, my pan is 9×13, so a square 8×8 pan would be perfect for these blueberry oat bars!

blueberry oatmeal breakfast crumble bar recipeblueberry oatmeal breakfast crumble bar recipe

Blueberry Oat Bars


Oat layer

  • 1/2 cup melted butter
  • 1 cup flour
  • 3/4 cup oats (I used Quaker quick oats)
  • 1/2 cup sugar

Blueberry layer

  • 2 cups frozen blueberries
  • 1/4 cup sugar
  • 2 tspn flour
  • 1/2 lemon


  1. Preheat oven to 350ยฐF.

  2. Add oats, flour, and sugar to the melted butter. Combine until a crumble mixture forms. The texture should be similar to clumpy wet sand.

  3. Leave a cup of the crumble mixture to the side, and press the rest down on a baking sheet lined pan.

  4. In a large bowl combine the sugar, flour, and half the juice of a lemon with the frozen blueberries.

  5. Layer the blueberry mixture over of the oat layer, and sprinkle the rest of the oat crumble on top.

  6. Bake for 50 minutes or until the crumble layer is slightly golden. Cool completely before slicing into bars. Enjoy! ๐Ÿ™‚

Recipe Notes

Recipe adapted from Averie Cookies

xo sandra when she wanders

27 Comment

  1. This looks so healthy and delicious heh. I love your recipe posts! But pls send some over next time ๐Ÿ™‚

    1. Make this when you have time!! It’s so easy and seriously super good haha! ๐Ÿ˜€

  2. Why do you always make me hungry!? XD XD This looks amazing, and I want to make it too!
    By the way, I nominated you for the Blogger Recognition Award. Please check it out ๐Ÿ˜‰ Love you <3

    1. Hehe you should definitely give it a try! ๐Ÿ˜€
      And thank you so much Maggie, will go check it out soon! <3

  3. omg that looks devine!! I”ll be saving this for future reference

    1. Thank you Em! ๐Ÿ™‚

  4. Kiki says: Reply

    Omg the look so delicious ๐Ÿ™Œ๐Ÿ˜I will try to make them ๐Ÿ’‹

    1. Thanks girl, hope you love them! ๐Ÿ™‚

  5. I love all blueberry things! My mum used to bake the most amazing blueberry pie, but I bet this is a very close second ๐Ÿ˜‰
    Katja xxx

    1. Thank you! I’d say these are basically the bar version of a blueberry pie haha! ๐Ÿ™‚

  6. Those look delicious and great pictures! I’m way into oats lately and I love how filling and satiating they can be!

    1. Thank you! I looove adding oats to recipes. Love the texture it gives them!

  7. Thanks for sharing! This looks like a super budget friendly dessert/brekky to whip up. Frozen blueberries always seem to be on sale at my stores and the rest of the ingredients are pantry staples. Perfect! xoxo

    1. They definitely are- another reason why I looove this recipe! ๐Ÿ™‚

  8. Nora says: Reply

    I love blueberries! And I can only imagine how delicious these were. ๐Ÿ™‚ Thanks for sharing the recipe, a woman can never have too many blueberry recipes, right?

    1. Hehe yup you’re right! ๐Ÿ™‚

  9. I am guessing I am the only 19 year old that doesn’t know how to cook, but you made this recipe super easy even for me! By the way, it sounds so delicious and healthy!
    BS, xx |

    1. Haha– It’s definitely super easy and hard to mess up! Thank you! ๐Ÿ™‚

  10. Those bars look amazing. They definitely look like something I would like to do for a snack.

    1. Thank you, they make the perfect snack! ๐Ÿ˜€

  11. WOW this looks so delicious and it’s healthy too! Gonna try this sometime YUM <3 –

    1. Thank you! Hope you love it! ๐Ÿ™‚

  12. These look delicious, although I’m not a blueberry fan but I’m sure other fruit would work ๐Ÿ™‚

    1. Thank you, and yeah I’m sure this would work well with other fruits as well! Such a good idea actually! ๐Ÿ™‚

  13. Looks and sounds wonderful…I’m afraid I might eat them all by myself! Hahaha…thank you for sharing! ๐Ÿ™‚

    1. Thank you! Hehe that is exactly what I did… but I made another batch yesterday to share! ๐Ÿ˜€

  14. Haneef says: Reply

    Those look delicious! Sadly I’m allergic to blueberries! Think I can replace them with blackberries?

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