Step 1: Preheat your oven to 350°F (175°C) to ensure it’s ready for your delicious lemon bars.
Step 2: In a mixing bowl, cream together the unsalted butter and 1/2 cup granulated sugar until light and fluffy. Add in the 1 1/2 tsp vanilla extract and mix until combined. Gradually incorporate 2 cups all-purpose flour and 1/4 tsp salt until the mixture resembles a crumbly dough.
Step 3: Press the dough into the bottom of your 9x13-inch baking pan evenly. Bake in the preheated oven for about 20 minutes, or until lightly golden. Remove from the oven and let cool slightly.
Step 4: In a large bowl, whisk together 7 large eggs until well beaten. Gradually add in 3 cups granulated sugar and whisk until fully incorporated. Stir in the 2 tbsp lemon zest and 1 cup lemon juice, mixing until smooth.
Step 5: Sift 1 cup all-purpose flour into the lemon mixture and gently fold until just combined, being careful not to overmix.
Step 6: Pour the lemon filling over the pre-baked crust and return to the oven. Bake for an additional 25-30 minutes, or until the filling is set and the edges are lightly golden.
Step 7: Once baked, remove from the oven and allow the bars to cool completely in the pan on a cooling rack. Once cooled, dust the top with confectioners sugar for a lovely finish.
Step 8: Once fully cooled, cut into squares or rectangles, serve, and enjoy the delightful flavors of your homemade lemon bars!