Description
Blueberry Oatmeal Bars made with lemon zest and buttery crumbles. Easy, fruity, and perfect for breakfast, snack, or dessert!
Ingredients
Crust and Crumbles
140 grams (1 cup) all-purpose flour, dip and sweep
144 grams (1 and ½ cup) rolled oats
140 grams (⅔ cup) granulated sugar
150 grams (⅔ cup) unsalted butter, melted and cooled*
Blueberry Filling
300 grams (2 cups) blueberries**
50 grams (¼ cup) granulated sugar
2 teaspoons cornstarch
1 tablespoon lemon juice
1 and ½ teaspoons lemon zest (zest of 1 large lemon)
Instructions
- Preheat and Prep Pan
Preheat your oven to 350°F (177°C). Grease an 8-inch (20 cm) square baking dish and line it with parchment paper, leaving a 2-inch (5 cm) overhang on all sides for easy removal. - Make the Dough
In a medium mixing bowl, combine the all-purpose flour, rolled oats, and granulated sugar. Stir with a spoon or spatula until evenly mixed.
Pour in the melted and cooled butter. Stir until the mixture is fully incorporated and crumbly. - Divide the Dough
Set aside one-third of the mixture (about 190g or a heaping ⅔ cup packed) for the crumble topping.
Press the remaining two-thirds into the bottom of the prepared pan, spreading it out evenly with the back of a spoon or your hands to form the crust. - Prepare the Blueberry Filling
In another medium bowl, combine the blueberries, sugar, cornstarch, lemon juice, and lemon zest. Gently toss until the blueberries are evenly coated. - Assemble the Bars
Spoon the blueberry mixture evenly over the pressed crust.
Sprinkle the reserved dough over the top of the blueberry layer. Lightly press the crumble with your fingertips so it adheres to the fruit. - Bake
Place in the preheated oven and bake for 38–40 minutes, or until the top is golden brown and the crumbles are crisp. - Cool and Slice
Allow the bars to cool completely in the pan before lifting out with the parchment paper and slicing into 16 bars.
Notes
To cool butter quickly: Melt it halfway, then remove from heat and stir until fully melted.
Frozen blueberries can be used directly without thawing.
- Prep Time: 15 minutes
- Cook Time: 40 minutes
- Category: Dessert, Snack
- Method: Baking
- Cuisine: American
Keywords: blueberry oatmeal bars, blueberry lemon bars, fruit crumble bars, easy blueberry dessert, oat bars