Blueberry Oatmeal Bars

These blueberry oatmeal bars are made with a thick layer of oatmeal crust, a sweet bubbly layer of fresh blueberries, and topped with more cinnamon crumble. They’re simple to make, easy to freeze, and delicious any time of day.

Need another healthy breakfast or snack option with fresh blueberries? Try these blueberry muffin energy bites or naturally sweet blueberry popsicles.

I had some blueberries remaining from a 5-pound box and I wanted to use ingredients I had on hand — the final product was these gooey blueberry oatmeal bars. 

Blueberry Oatmeal Bars

Imagine your favorite buttery crumb topping on coffee cake muffins. Take all of of that sweet goodness and press it into the bottom of a pan, top it with gooey blueberry filling, and more crumb topping sprinkled on top.

That’s exactly what’s happening in these blueberry oatmeal bars!

There are three layers, but you only need to make 2 of them because the top and bottom layers are from the same dough. This simple dessert makes such a statement!

I highly recommend serving them warm with a scoop of vanilla ice cream for the perfect dessert. I love warm fruit desserts with ice cream (helloooo peach apple crisp).

Next time you have extra blueberries or are just craving a sweet to go with your cup of coffee, I hope you think of these blueberry oat bars (but you wouldn’t be mad if you made a blueberry muffin either).

Looking for a breakfast version? Try this blueberry baked oatmeal next!

The Simple Ingredients

Here are the simple ingredients for these easy blueberry oatmeal bars. Most are pantry staples and easy (and affordable) to find in the grocery store. Jump down to the recipe card for exact measurements.

• Unsalted butter: I love the flavor butter gives this recipe. We tested these with vegan butter and it worked well, but you could also use coconut oil.
• Flour: White whole wheat flour is a great option for whole grains. We also tested this using 1:1 gluten-free flour (Bob’s Red Mill). 3/4 cup 
• Old fashioned oats: This is the best type of oat for this recipe, but instant oats or quick oats will work if you have those on hand.
• Cinnamon, vanilla extract, and salt: For extra flavor.
• Brown sugar: I like to use the brown sugar if I’m making it for dessert, but I opt for coconut sugar or maple syrup for the breakfast version.
• Blueberries: Fresh or frozen work well (so you can have these year round!)
• Pure maple syrup: This helps sweeten up the blueberries just enough.
• Lemon juice: The acid balances the sweetness in this recipe. Add a little lemon zest too if you feel like it!
• Corn starch: This helps the blueberry layer become extra gooey. Great subs for this are tapioca or arrowroot starch.

How to Make Blueberry Oatmeal Bars

Here are the basic steps, with images, for these blueberry oatmeal breakfast bars. Skip down to the recipe card below for the full instructions and a printable recipe.

Variations and Dietary Modifications

• Use other fresh fruit: If you’re not a big fan of blueberry flavor or you have peaches or strawberries on hand, they would be great options!
• Gluten-free: Use 1:1 gluten-free flour and gluten-free rolled oats.
• Dairy-free: Swap the butter or vegan butter or coconut oil.
• Refined sugar-free: Use coconut sugar and maple syrup instead of brown sugar and granulated sugar.
• Add protein: Serve with a scoop of Greek yogurt or drizzle natural peanut butter on top.

Storage Instructions

These can easily be a meal prep recipe! Kids love these in the morning, so follow the instructions to individually wrap each oatmeal crumble bar separately if you want to freeze them so they last longer.

Storage: Allow the bars to cool to room temperature and store any leftovers in an airtight container in the fridge for up to 5 days.

Freezer: Cut the bars into squares then wrap each one in plastic wrap. Place them in a freezer bag or airtight container and freeze for up to 3 months. Thaw overnight then warm in the microwave until warmed through.

If you make these delicious blueberry oatmeal bars, I’d love for you to give it a star rating ★ below. You can also tag me on Instagram so I can see it!

More Blueberry Recipes

Looking for more delicious recipes with blueberries? Give these recipes a try next time:

• Blueberry overnight oats are an easy breakfast to prep ahead of time and even take out the door with you!
• Overnight blueberry waffle casserole is layered with thick waffles and juicy blueberries and covered in cinnamon crumble.
• Brown butter blueberry coffee cake is always a crowd pleaser.
• Blueberry muffins with crumb topping are bursting with fresh blueberries and piled high with streusel topping.
• Lemon blueberry turnovers are like blueberry pie bars with a puff pastry outer layer.