Ingredients
Scale
- 1 ½ cups all-purpose flour
- 1 ½ cups old-fashioned rolled oats
- 1 cup granulated sugar (for crumble)
- ½ teaspoon baking powder
- ¼ teaspoon salt
- 1 cup unsalted butter, cold and cubed
- ½ cup granulated sugar (for lemon filling)
- 2 large eggs
- ¼ cup all-purpose flour (for lemon filling)
- ½ cup fresh lemon juice (from 2-3 lemons)
- 1 tablespoon lemon zest
Instructions
- Preheat your oven to 375°F (190°C). Lightly grease a 9×13 inch baking pan or line with parchment paper, leaving an overhang on the sides for easy removal.
- In a large bowl, whisk together 1 ½ cups flour, rolled oats, 1 cup granulated sugar, baking powder, and salt. Add the cold, cubed butter and cut it into the dry ingredients using a pastry blender, your fingertips, or a fork, until the mixture resembles coarse crumbs.
- Press about two-thirds of the crumble mixture evenly into the bottom of the prepared baking pan. Set aside the remaining one-third of the crumble mixture.
- In a separate medium bowl, whisk together the ½ cup granulated sugar for the filling, eggs, ¼ cup flour, fresh lemon juice, and lemon zest until well combined and smooth.
- Pour the lemon filling evenly over the pressed crumble crust in the baking pan.
- Evenly sprinkle the reserved one-third of the crumble mixture over the lemon filling.
- Bake for 30-35 minutes, or until the crumble topping is golden brown and the lemon filling is set and no longer jiggly in the center. A toothpick inserted into the crumble (not the filling) should come out clean.
- Remove the pan from the oven and let it cool completely on a wire rack before cutting into bars. This is crucial for the bars to set properly. Once cooled, lift the bars out of the pan using the parchment paper overhang and cut into 16 squares.
Notes
For the best texture and clean cuts, ensure the bars are completely cool before slicing – ideally, chill them in the refrigerator for at least an hour. Store leftover bars in an airtight container at room temperature for up to 3 days, or in the refrigerator for up to a week. You can also freeze them for longer storage! For an extra burst of flavor, try adding a tablespoon of poppy seeds to the lemon filling.
- Prep Time: 20 minutes
- Cook Time: 35 minutes
- Category: Dessert
- Method: Baking
- Cuisine: American
Nutrition
- Serving Size: 1 bar
- Calories: 320
- Sugar: 28g
- Sodium: 150mg
- Fat: 14g
- Saturated Fat: 8g
- Unsaturated Fat: 5g
- Trans Fat: 0g
- Carbohydrates: 45g
- Fiber: 2g
- Protein: 4g
- Cholesterol: 45mg