The perfect blueberry crumble bars!
Loaded with juicy blueberries and topped with a brown sugar-oatmeal crumble, these Oatmeal Breakfast Bars are a delicious breakfast bar recipe. Great to enjoy fresh out of the pan, or wrap up and freezer, these blueberry oatmeal bars are fantastic.
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One of our very favorite back to school treats are these blueberry oatmeal breakfast bars. This breakfast bar recipe is great for rushed school mornings. We will often make a batch, enjoy a few fresh out of the oven and then wrap and freeze the rest. Blueberry oatmeal bars also make a great after-school snack with a glass of milk!
In the very near future, we will be back in the swing of things with the start of a new school year. My son will be starting the first grade, and I’m really looking forward to it…him not so much. If it were up to Harrison he would have summer all year round, filled with unlimited scooter time, and playing outside with his friends.
But, soon enough we will be getting up earlier, and getting out the door for school in an effort to re-establish our school routine. This involves having something ready to go for breakfast, which is where these Blueberry Oatmeal Breakfast Bars come into play.
How this breakfast bar recipe comes together
These breakfast bars are not only delicious, they’re also super-easy to make. The blueberry filling can be made with either fresh or frozen blueberries, great for any time of the year. The oatmeal crust is amazing, as the brown sugar and oatmeal keep all the juices in the bar perfectly.
You’ll begin my mixing together the oatmeal brown sugar crust by combining the oatmeal, flour, brown sugar, soda and salt. Melt the butter, and pour over the oatmeal mixture. Mix together until incorporated and crumbly. Press 2/3 of the oatmeal mixture into a 9×13 pan, saving the other 1/3 for the topping.
Mix together the blueberries and sugar, and pour over the bottom crust, making sure the berries are evenly distributed over the crust. Then, top the berries with the remaining 1/3 of the crust. Simply crumble over the top of the berries.
Love pairing oats and fruit? Check out some of our other recipes:
- Banana Blueberry Oatmeal Muffins
- Raspberry Crumble
- Healthy Peach Crisp
- Peach Overnight Oats
- Cherry Overnight Oats
- Peach Crisp
- Mixed Berry Cobbler with Cake Mix
- Apple Cinnamon Baked Oatmeal Bars
- Peanut Butter Banana Baked Oatmeal
- Healthy Apple Muffins
- Chocolate Baked Oats

Bake up these easy blueberry oatmeal bars!
Bake the blueberry bars until golden brown and the blueberries are bubbly. Remove from the oven and let cool to room temperature before cutting. Feel free to cut into squares, or into long bars like these.
These oatmeal breakfast bars are great to wrap up, put in the freezer, and take out when you need a quick snack or breakfast on the run. They’re also great to put in a lunchbox or eat the car or bus when your crunched for time.

Much like my Cherry Almond Breakfast Cookies, this breakfast bar recipe is way better than any store-bought bar or cookie. Loaded with juicy, ripe blueberries and topped with a brown sugar-oatmeal crumble these bars are a delicious way to have breakfast on the run.
Would you like a healthier version of these blueberry oatmeal bars? Check out my Baked Blueberry Oatmeal Bars:
If you’re looking to go healthier for breakfast, check out all of my Healthy Breakfast Meal Prep recipes & ideas here:
Here’s a quick-reference grocery list of the ingredients you’ll need to make these yummy Blueberry Oatmeal Breakfast Bars:
- Old-Fashioned Oatmeal
- Flour
- Brown Sugar
- Butter
- Baking Soda
- Salt
- Blueberries
- Sugar
- Corn Starch
If you loved these fantastic blueberry oatmeal crumble bars, check out some of our other blueberry treats:
- Blueberry Cream Cheese Breakfast Braid
- Healthy Lemon Blueberry Loaf
- Blueberry Cream Cheese French Toast Bake
- Healthy Blueberry Muffins Recipe
- Blueberry Almond Chia Pudding
- Blueberry Protein Muffins
- Baked Blueberry Oatmeal
- Blueberry Vanilla Protein Oatmeal
- Blueberry Overnight Oats

Blueberry Oatmeal Breakfast Bars
Loaded with fresh blueberries baked between a sweet brown sugar, oatmeal crust these breakfast bars are perfect for any morning!
Ingredients
- 2 1/4 c. Old Fashioned oatmeal
- 2 1/4 c. flour
- 1 1/2 c. brown sugar
- 1 c. butter (2 sticks)
- 1 1/2 tsp. baking soda
- 1/2 tsp. salt
- 3 c. fresh or frozen blueberries
- 1/4 c. sugar
- 1 Tbsp. corn starch
Instructions
- Preheat oven to 350 degrees.
- In a mixing bowl combine the oatmeal, flour, brown sugar, soda and salt. Melt the butter, and pour over the oatmeal mixture. Mix until incorporated and crumbly. Press 2/3 of the oatmeal mixture into a 9x13 pan, saving the other 1/3 for the topping.
- In a seperate bowl, combine the blueberries, sugar and corn starch. Mix until the blueberries are evenly coated with the sugar and corn starch. Pour over the bottom crust. Crumble the remaining oatmeal mixture over the blueberries. Bake at 350 for 20-25 minutes or until golden brown.
- Remove from the oven and let cool completely before cutting.
Recommended Products
As an Amazon Associate and member of other affiliate programs, I earn from qualifying purchases.
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Pyrex Smart Essentials 3-Piece Prepware Mixing Bowl Set, 1-Qt, 1.5-Qt ,and 2.5-Qt Glass Mixing Bowls, Dishwasher, Microwave and Freezer Safe
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HOTEC Food Grade Silicone Rubber Spatula Set for Kitchen Baking, Cooking, and Mixing High Heat Resistant Non Stick Dishwasher Safe BPA-Free Multicolor Set of 5 Grey
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OXO 9 x 13" Good Grips Non-Stick Pro Cake Pan
Nutrition Information:
Yield: 18 Serving Size: 1Amount Per Serving: Calories: 250Total Fat: 11gSaturated Fat: 7gTrans Fat: 0gUnsaturated Fat: 4gCholesterol: 27mgSodium: 257mgCarbohydrates: 36gFiber: 2gSugar: 19gProtein: 3g
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