Preheat your oven to 350°F (175°C). Line a 9x13 inch baking pan with parchment paper, allowing the edges to hang over the sides by about 2 inches. This makes removing the bars much easier and prevents sticking. Pro tip: Using parchment paper is a game-changer for this easy lemon bars recipe—it prevents any sticking and creates clean, professional-looking edges.

In a medium bowl, combine the softened butter, 2 cups flour, 1/2 cup granulated sugar, and 1/4 teaspoon salt. Mix with an electric mixer on low speed until the mixture resembles coarse breadcrumbs and just starts to come together. Pro tip: Don't overmix—you want a slightly crumbly texture that will hold together when pressed, not a uniform dough.

Press the mixture firmly and evenly into the prepared baking pan, using the bottom of a measuring cup to create a smooth, compact layer. This is your base for the best lemon bars recipe. Pro tip: Make sure the base is pressed all the way into the corners and edges for uniform baking. A thin, even base ensures crispy texture throughout.

Bake the base for 12-15 minutes until light golden brown and set. You want it just barely cooked at this stage—it will firm up further when the filling is added. Pro tip: Don't skip this pre-baking step. It ensures your simple lemon bars won't have a soggy bottom.

While the base bakes, combine eggs, 1.5 cups sugar, 1/4 cup flour, cornstarch, lemon juice, lemon zest, and 1/4 teaspoon salt in a large bowl. Pro tip: Strain your fresh lemon juice through a fine mesh to remove any pulp—this creates a smoother filling in your homemade lemon bars.

Whisk the filling mixture by hand or with an electric mixer on medium speed for about 1-2 minutes until well combined and slightly frothy. The filling should be smooth and unified in color. Pro tip: Don't overbeat the filling—you don't want to incorporate too much air, which can cause cracks on top. Just mix until combined.

Remove the pre-baked base from the oven and immediately pour the lemon filling over it, spreading evenly with a spatula. The hot base will help set the bottom of your lemon bar recipe easy. Pro tip: Work quickly but carefully to spread the filling evenly. If you have any air bubbles, tap the pan gently on the counter to release them.

Return the pan to the oven and bake for 20-25 minutes. The filling should be set around the edges but still have a very slight jiggle in the center (about 2 inches in diameter). This is the sweet spot for no-fail lemon bars—it means they'll set up perfectly as they cool. Pro tip: This is the most important step for perfect buttery lemon bars. Overbaking results in a rubbery filling; underbaking leaves it too custardy. Start checking at 20 minutes.

Remove from the oven and let cool to room temperature on a wire rack, about 1 hour. The bars will continue to set as they cool. Pro tip: This cooling step is crucial for setting the filling properly. Don't skip it or refrigerate too early.

Once cooled, refrigerate for at least 2 hours, or preferably overnight. This ensures the bars are completely set and will cut cleanly into squares. Pro tip: Cold bars are much easier to cut cleanly. Use a sharp knife dipped in hot water and wiped dry between cuts for perfect edges on your quick lemon dessert.

Remove from the refrigerator and use the parchment paper overhang to lift the entire block out of the pan onto a cutting board. Using a sharp knife, cut into 12-16 squares depending on desired size. Pro tip: A hot knife makes the cleanest cuts. Dip a sharp chef's knife in hot water, wipe it dry, cut one bar, then repeat. This prevents the filling from smudging.

Dust each bar generously with powdered sugar using a fine mesh strainer. For extra pizzazz, add a second dusting just before serving. This finishing touch completes your easy lemon bars recipe. Pro tip: The powdered sugar not only looks beautiful but adds a subtle sweetness that balances the tartness of the lemon.