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Oatmeal Berry Crumb Bars

Oatmeal Berry Crumb Bars

Time is flying in a really unbelievable way.

I know that because a) I have 242 unread emails in ONE inbox and 110 in another and every day I skim through for anything urgent and declare that tomorrow will be the day I get it whittled down to nothing (#fail), and b) because it is already time for me to share another Leftovers Club post.

I swear I made this M & M Cookie Skillet Sundae like… last week or something.

If you are wondering whyyyy you should care about Leftovers Club if I am not putting dessert for YOU in the mail. And I’ll tell you:

It’s because shippable goodies are a good little trick to have up your sleeve.

I firmly believe in mailing treats. Once I even mailed cupcakes. It worked.

This month I was partnered up with Marie from Little Kitchie and ohmygoshIlovehersomuch. Like really.

Oatmeal Berry Bars with Crumble Topping


She makes the happiest most colorful dinner dishes and has these filtered Instagrammey photos and I really just want to go to her little kitchen and eat all the food. She sent me these Spicy Honey Mustard Roasted Cashews that were out of control delicious. They came in the mail and Chad and I were like ravenous snack monsters. He has gotten hip to the Leftovers Club plans and gets pretty excited about what people are sending me in the mail.

I need to do a better job of hiding the treats.

So anyway. I made Marie these Oatmeal Berry Crumb Bars. I had a whole other plan for what was going in the mail, but I have this berry-buying problem and have this compulsion to toss them in my cart every time I pass them and they look pretty (thank god for hydroponic gardening!).

Berry Crumb Bars with an Oatmeal Crust


These little bars are quick and super easy. The crust and the topping are the same but the crust is pressed and the topping is scattered. The cooked berry filling only takes a few minutes to become thick and jammy. These are so perfect with coffee and of course are super simple to stuff in the mail.

If you’d like to participate in the Leftovers Club you can find info HERE.

Berry Crumb Bars with an Oatmeal Crust
Yield: 24-30 bars

Oatmeal Berry Crumb Bars

Prep Time: 10 minutes
Cook Time: 25 minutes
Total Time: 35 minutes

Oatmeal Berry Crumb Bars have a simple buttery oat crust topped with cooked berries and a sweet crumbly topping. Perfect with coffee!


For the Crust/Topping:

  • 1 1/2 cups all purpose flour
  • 1 1/2 cups quick oats (see note)
  • 1 cup granulated sugar
  • 1/2 teaspoon baking soda
  • 3/4 cup COLD butter

For the Berry Filling:

  • 3 cups assorted fresh (or frozen, unsweetened) berries (I used sliced strawberries, whole blueberries, and whole blackberries)
  • 2 1/2 tablespoons granulated sugar
  • 1 tablespoon lemon juice
  • 2 tablespoons water
  • 1 tablespoon cornstarch


  1. Preheat the oven to 375.
  2. In a large bowl whisk together the flour, quick oats, sugar, and baking soda.
  3. Cut in the butter using a box grater and then use your fingers to combine everything into coarse crumbs (some pieces will be larger and some will be very fine; just do your best to incorporate the butter and the largest pieces should be pea-sized).
  4. Set 2 cups of the mixture aside and press the remaining crumbs into the bottom of an un-greased 9 X 13 pan.
  5. Place the berries and sugar into a medium saucepan over medium high heat. Add the lemon juice, water, and cornstarch. Stir to coat. The liquid will simmer and the berries will mostly break down. Continue cooking and stirring for 3-4 minutes, until the mixture is a thick jam-like consistency.
  6. Spoon the berries over the crust and spread it evenly.
  7. Scatter the reserved crust loosely over the top of the berries, covering everything.
  8. Bake for about 25 minutes. Let the bars cool completely before cutting.


If you only have old fashioned oats on hand you can pulse them in a blender of food processor once or twice to yield quick oats.

Nutrition Information:



Serving Size:


Amount Per Serving: Calories: 143Total Fat: 6gSaturated Fat: 4gTrans Fat: 0gUnsaturated Fat: 2gCholesterol: 15mgSodium: 84mgCarbohydrates: 21gFiber: 1gSugar: 11gProtein: 2g

Recipe adapted from Taste of Home Baking Classics Blueberry Oat Bars

If you love the berry oat flavor you’ll also love this Raspberry Apple Pie with Oatmeal Cookie Crumble!

Raspberry Apple Pie with Oatmeal Cookie Crumble


Friday 17th of February 2023

Hi! I found your recipe while searching the web! My berry mixture is more like ice cream topping. A bit thick, but not like jam. Do I need to keep heating it? Also, does it go over the oats cool or warm? Thanks so much, it looks soooo good.


Monday 22nd of February 2021

Delicious, thank you for the recipe ?

Side note: I’m not sure if was because I used frozen berries but when I boiled the fruit and other ingredients it accumulated a lot of liquid so I had to add an additional tbsp of cornstarch to thicken it up. Otherwise, delicious and will be making again!

Rose Powers

Wednesday 29th of July 2020

These are wonderful! My husband likes them but wants more filling so will double next time. But they are great.

Heather Tullos

Thursday 30th of July 2020

Oh good! Thank you so much Rose! I am glad you enjoyed them!


Friday 3rd of November 2017

I just wanted to say that my husband and I really enjoy your version of the oatmeal berry bars!!! I make the very often and my husband can practically eat the whole thing in just one day (so can I). It's sooooooo yummy! Thank you for this recipe!!

Heather Tullos

Friday 3rd of November 2017

Thank you so much, Sharon! I love those too. That's an old but super good recipe!


Sunday 14th of September 2014

These are the best things ever! Even before adding the oatmeal I found myself licking the berries out of the pan!


Sunday 14th of September 2014

Thanks so much, Paul! That is definitely one of my favorite recipes ever!

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