Ingredients
Crust
- 12 tablespoons (170 g) unsalted butter, room temperature
- 1/3 cup (40 g) powdered sugar
- 1 teaspoon vanilla extract
- 1 1/2 cups (188 g) all-purpose flour, spooned and leveled
- Pinch of kosher salt
Lemon Filling
- 1/2 cup (113 g) unsalted butter, cut into cubes and room temperature
- 1 heaping tablespoon Meyer lemon zest (from 1 to 2 large Meyer lemons)
- 1 1/3 cups granulated sugar (266 g) (add an extra 2 tablespoons if using regular lemons)
- 4 large eggs, room temperature
- 1 teaspoon vanilla extract
- 1 cup fresh Meyer lemon juice
- Pinch of fine sea salt
Topping
- Powdered sugar, for dusting (optional)
Instructions
- Prepare the crust: Preheat the oven to 350°F (175°C). Line a 9 x 9 inch baking pan with parchment paper, extending the edges over the sides for easy removal. Set aside.
- Cream butter and sugar: In a stand mixer bowl fitted with the paddle attachment, cream the room temperature butter and powdered sugar on low speed until combined. Increase to medium speed and beat until creamy, about 2 minutes.
- Add vanilla and dry ingredients: Mix in vanilla extract. Add the flour and kosher salt, mixing until the dough comes together but is still crumbly.
- Form and chill crust: Transfer dough to the prepared pan and press evenly into the corners using your hands and the bottom of a measuring cup or spatula to level the surface. Chill in the refrigerator for 20 minutes.
- Bake crust: Bake the crust on the center rack for 15-20 minutes, until the center is set and edges are lightly golden. Avoid overbaking.
- Lower oven temp: Remove crust and reduce oven temperature to 325°F (160°C).
- Make lemon filling: In a large bowl, combine lemon zest and softened butter. In a medium saucepan over medium-low heat, whisk together granulated sugar, eggs, vanilla extract, and sea salt until combined. Gradually add lemon juice, whisking constantly. Continue whisking over medium-low heat as the mixture thickens, scraping the sides and bottom to prevent burning. Use a thermometer to cook until the mixture reaches 160-165°F (71-74°C) and coats the back of a spatula.
- Strain filling: Remove from heat and strain the lemon filling through a fine sieve into the bowl with lemon zest and butter. Stir until butter melts and filling is smooth and shiny.
- Bake lemon bars: Pour the filling evenly over the baked crust. Return the pan to the oven at 325°F and bake 15-20 minutes. The center should jiggle like jello but not be runny.
- Cool and chill: Remove from oven and cool on a wire rack for 1 hour. Then refrigerate for at least 3 hours or overnight.
- Serve: Dust with powdered sugar before slicing into 16 squares. Use a hot, clean knife for best slices.
Notes
- For the cleanest slices, chill the bars overnight before cutting.
- Use a hot, clean knife for each cut to prevent sticking and messy edges.
- Store bars tightly covered in the refrigerator for up to 4 days.
- If regular lemons are used instead of Meyer lemons, increase granulated sugar by 2 tablespoons to balance tartness.
- Prep Time: 25 minutes
- Cook Time: 40 minutes
- Category: Bars & Brownies
- Method: Baking
- Cuisine: American