Ingredients
Crust
- 1 cup sugar
- 1 tablespoon fresh lemon zest
- 3 cups all-purpose flour
- ½ teaspoon salt
- ¾ cup unsalted butter, melted
Filling
- 3 large eggs
- ⅓ cup half and half
- 1 cup brown sugar
- 1 tablespoon fresh lemon zest
- 1 tablespoon fresh lemon juice
- 1 teaspoon vanilla bean paste
- 1 tablespoon cornstarch
- Pinch of kosher salt
- 2 to 2 ½ cups fresh or frozen blueberries
Instructions
- Preheat and prepare dish. Preheat the oven to 350 degrees F. Spray a 9×13 inch baking dish with nonstick spray to prevent sticking.
- Make lemon sugar for the crust. In a small bowl, rub the sugar together with 1 tablespoon fresh lemon zest until lemon zest is evenly distributed throughout the sugar.
- Form the crust dough. In a large bowl, combine the flour, lemon sugar, and ½ teaspoon salt. Add the melted butter and stir until a shortbread-like dough forms. Use your hands if needed to bring it together.
- Press crust into dish. Press half of the dough evenly into the bottom of the prepared baking dish, creating the base layer.
- Prepare filling. In a separate bowl, whisk together the eggs, half and half, brown sugar, 1 tablespoon lemon zest, lemon juice, vanilla bean paste, pinch of kosher salt, and cornstarch until smooth. Gently fold in the blueberries to coat them without breaking.
- Assemble bars. Pour the blueberry filling mixture over the pressed crust. Crumble the remaining half of the shortbread dough over the top of the filling, distributing it evenly.
- Bake. Bake in the preheated oven for 40 to 45 minutes, or until the bars are set and no longer jiggly in the center.
- Cool and slice. Allow the bars to cool completely in the baking dish before slicing. For best results, chill in the refrigerator overnight before cutting into squares.
Notes
- You can use fresh or frozen blueberries; if frozen, do not thaw before adding to filling.
- Chilling the bars overnight helps them set fully and makes them easier to slice.
- Vanilla bean paste can be substituted with pure vanilla extract if unavailable.
- Make sure to evenly distribute the lemon zest in the sugar to get bright lemon flavor throughout the crust.
- Pressing the crust firmly ensures a sturdy base for the bars.
- Prep Time: 30 minutes
- Cook Time: 45 minutes
- Category: Dessert
- Method: Baking
- Cuisine: American