These Blueberry Oatmeal Crumble Bars are one of my favorite easy bakes – a buttery oat crust, a generous layer of sweet blueberry filling, and a golden, crumbly oat topping that comes together in one pan.They strike the perfect balance between breakfast treat, afternoon snack, and casual dessert.I especially love using my homemade Blueberry Pie Filling for big juicy berry pieces, but store-bought blueberry jam works great when you’re short on time.

If you’re into easy fruit bars like this, you’ll also want to try my viral Raspberry Oatmeal Crumble Bars for another simple, fruity favorite.Want to save this recipe?Just enter your email and get it sent to your inbox! Plus you’ll get new recipes from us every week!Email *Save Recipe Ingredients & Substitutions All-purpose flour: Provides structure for the crust and crumble.You can swap in a 1:1 gluten-free baking flour if needed.

Old-fashioned oats: Adds texture and a hearty, chewy crumble.Quick oats can be used, but the texture will be softer and less defined.Light brown sugar: Sweetens the bars and adds a hint of caramel flavor.

Dark brown sugar can be used for a deeper, richer taste.Baking soda: Helps lightly tenderize the crumble so it bakes up crisp but not too dense.Kosher salt: Balances the sweetness and enhances overall flavor.

Unsalted butter (melted): Binds the crumble together and creates that rich, buttery texture.Salted butter can be used; just reduce the added sa

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