Blackberry Oatmeal Crumble Bars

Blackberry Oatmeal Crumble Bars are made with only four ingredients and are out-of-this-world amazing!

Blackberry Oatmeal Crumble Bars from - Made with only four ingredients and are out-of-this-world amazing!

A couple of weeks ago my Dad and brother came over to install a ceiling fan in our patio.  Summers are crazy hot here in Sacramento and this fan is going to make the patio a much more comfortable place to hang out.  I asked my Dad if he had any requests for snacks or treats while he was working and he said, “Oh anything would be fine” which I understood as, “You better make me something good!”

It dawned on me that I hadn’t made any of my mom’s oatmeal crumble bars in a long while and I knew they would be perfect to snack on during the day.  I grew up on these bars.  I started making them when I was about 8 years old and haven’t stopped since. They are SO, SO, SO easy and you are not going to believe how yummy they are!   The crumble portion of the bars is made with yellow cake mix, oatmeal, and butter.  That’s it.  And it’s divine.

Blackberry Oatmeal Crumble Bars from - Made with only four ingredients and are out-of-this-world amazing!

I love recipes like this that are so easy and taste like a million bucks. This crumble bars recipe is a great recipe to have your kids help out with.  There are no eggs involved and the steps are so simple there’s really no way to mess it up.  I will forewarn you that the crumble mixture is completely and totally addicting.  The only way I can keep from snacking on it is because I know it tastes even better after they’re done :)

Speaking of after the bars are baked…now is a good time to enjoy the bars. We do – with a spoon!  Straight from the oven the bars are just heavenly. If you think of it – spoon some into a bowl and top it with a scoop of vanilla ice cream.  Then you can come back and thank me.  It’s incredible!  I’m slightly embarrassed to say that close to half of the 9 x 13 baking dish was eating via spoon.  The good news?  We still had half to cut into bars the following day!

Blackberry Oatmeal Crumble Bars
  • 1 package yellow cake mix
  • 2½ cups quick-cooking oats
  • ¾ cups butter, melted
  • 1 cup blackberry preserves or jam
  • 1 Tbls water (optional)
  1. Preheat oven to 375 degrees.
  2. Line a 9 x 13 baking dish with parchment paper or grease with cooking spray.
  3. Mix cake mix and oats in a large bowl.
  4. Add melted butter, stir until crumbly.
  5. Press down half the crumbs onto the bottom of the pan.
  6. Combine preserves and water, spread over crumbs. If preserves are already easy to spread, you don't need to add the water.
  7. Spread remaining crumbs over preserves and press down firmly.
  8. Bake for 18 to 23 minutes or until very lightly golden brown.
  9. Eat warm or cool, cut into bars, and serve.

I love the variety of bars that can be made with this recipe and I’m excited to share more of them soon!

Blackberry Oatmeal Crumble Bars from - Made with only four ingredients and are out-of-this-world amazing!

More of our favorite bar recipes:


Raspberry Coconut Magic Bars


Chocolate Cherry Marshmallow Crunch Bars


Reese’s Peanut Butter Oatmeal Cookie Bars


Coconut Toffee Chocolate Chip Cookie Bars

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  1. Yummy! These bars look awesome, definitely wouldn’t mind having one of these with my coffee in the morning :)
    Happy Valley Chow recently posted..Homemade Sriracha

  2. A neighbor of mine made raspberry oatmeal crumble bars recently, and I think it was a similar recipe. They were gone very quickly — so good! I might just have to make these TOMORROW!! (Forget the diet!)
    Lauren @momhomeguide recently posted..What’s New and Popular on Mom Home Guide

  3. These look so amazing. I am going to have to run to the store to get the blueberries. I have all the rest of the ingredients. Thanks for the recipe!
    Beth @ recently posted..Khan Academy – Learn Anything

  4. My husband would go crazy for those! They sound amazing!
    [email protected] recently posted..Time To Sparkle Tuesday Link Party #13

  5. These do sound pretty easy! I can’t wait to try! :)
    Liz recently posted..Cream of Wheat – Free Sample of NEW Cinnamon Swirl Flavor!

  6. These bars look incredible and I bet so delicious!
    Nancy P.@thebittersideofsweet recently posted..Blueberry Banana Muffins

  7. These look really yummy! I love blackberries. I found your blog on Tuesday Talent Show over at Chef In Training.
    [email protected] recently posted..Strawberry and Almond Swirls for June’s #Twelveloaves

  8. Mmmm I love any type of crumble bar! These sound awesome!
    Katie recently posted..Greek Crostini with Whipped Feta

  9. Trish, you sound like me…loved to bake at such a young age. These are a must to bake very soon! Thank you for sharing!
    Gloria @ Simply Gloria recently posted..Cinnamon Cream Cheese Pastry Doughnuts

  10. Whoa yum! Gotta try these, and pinning them to make sure I do!

  11. This looks and sounds delicious!!! We would love it if you would link up at our linky party:
    Live every Wednesday to Sunday.
    Hosted by: Parrish @ Life with the Crust Cut Off Dana @ This Silly Girl’s Life
    We hope to see you there!
    Parrish (Life With The Crust Cut Off) recently posted..Two Girls and a Party {Linky Party #20}

  12. Beautiful photos, Trish!!
    Meghan @ The Tasty Fork recently posted..Grilled Shrimp with Crunchy Asian Slaw Salad

  13. Gorgeous photos, and this recipe sounds so good and easy!
    Andi @ The Weary Chef recently posted..Bonus Recipe: Cheese Stuffed Breadsticks

  14. Oooh! Yum, yum, yum!!!

  15. These are so pretty!

  16. Just bookmarked this! Definitely going to try these :)
    Kara recently posted..Crochet Ball Centerpiece

  17. oooh delish!

  18. What a great recipe:) Looks delicious and perfect for summer~Lynn @ Turnips 2 Tangerines
    Lynn H @ Turnips 2 Tangerines recently posted..Praline Pecan Brownies

  19. These bars look so fantastic, I think I could eat them for breakfast! Thanks for linking up with What’s Cookin’ Wednesday!
    Karly recently posted..Skinny Poolside Dip

  20. These look fantastic! I love crumble bars!
    Alyssa Rivers recently posted..Time to Sparkle Link Party #15

  21. Oh wow! Yummo!
    [email protected] recently posted..Homemade Hazelnut Ice Cream (No Machine)

  22. I love how absolutely easy these are by using the cake mix! Cake mix is seriously the bomb! Now I wonder if I close my eyes if these will appear in front of me when I open them?
    Jocelyn BruCrew Life recently posted..Biscoff Peach Empanadas

  23. What a yummy recipe. I had to pin it to by Blackberry Recipes board on Pinterest (
    Heidi recently posted..25 Free and Bargain eBooks 7/27/13

  24. Mmmmm…. JUST made them. DELICIOUS and so easy!
    Thanks for the recipe.

  25. Do you have to use yellow cake mix? I have a yellow cake recipe that I could use and I’d rather keep this all homemade

  26. I made these for the office and everyone loved them. I’m making another batch next week for a co-worker’s birthday. I’m thinking of making it a little more festive by doing a double batch and making it like a layer cake with some nutella between the two layers.

  27. Crumble bars are the best! I love it even more with oatmeal!
    Chung-Ah | Damn Delicious recently posted..Wonton Mozzarella Sticks

  28. Just found and am pinning now! Made a jam for Xmas presents (strawberry, raspberry and fig) and have a bit leftover. This will be a great way to use some of it… Thanks & Happy New Year!

  29. Great recipe for something fairly quick! And anything with blackberries can’t be all bad, right? LOL!
    Toodie recently posted..Add Some Pictures to the Family Tree…

  30. These sound divine! Do you think regular oats would work instead of using the quick-cooking ones? I’m trying to use what I have in the kitchen. Thanks!

  31. Do you think you could us fresh blackberries instead of the jam or preserves?

  32. I absolutely loved this recipe, I made this for my work for a potluck and it turned out perfect!

  33. Chris C. says:

    Saw this recipe at 9pm, jumped up & made a10 minute blackberry jam & made these bars. I found Ki needed an additional 3/4 cup of jam to completely cover, but these are fantastic & super duper easy. Thank you very much!??

  34. Kentuckylady717 says:

    Wow! you have some great recipes on here….I just wrote down the Oatmeal Bars and will be making them soon…
    The coconut pie will be my next thing I make…..
    I am sure I will find many many more things to make too…

  35. Hello Trish,
    Stumble into your blog recently and love your recipes!
    I only have regular oats in my pantry. Can I use that in stead of quick-cooking oats?

  36. Sounds wonderful! Can I use canned blueberry or cherry pie filling in place of the jam?

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