These Super Easy Lemon Bars combine a tart and tangy lemon curd filling with a buttery, shortbread crust. Made in an 8" x 8" baking pan, they make the perfect citrus-y treat to enjoy with family, friends, or coworkers all year round!
Lightly spray an 8” x 8” baking pan with a flour-based baking spray. Set to the side. If you'd like, you can spray the pan, then place a parchment paper sling into the pan which can help make for easier cutting later. To prevent the sides from collapsing into the bars during baking, you can place a binder clips on top of the paper.
Using a hand mixer or a stand mixer fitted with a paddle attachment, beat together the unsalted butter, all-purpose flour, and powdered sugar until the shortbread bottom layer forms. It will resemble light yellow loose crumbs. Pat the shortbread layer into the bottom of the prepared 8″ x 8″ pan. Then place in the freezer or refrigerator for about 10-15 minutes to chill. You can skip the chilling if you're using a glass baking dish.
½ cup Unsalted Butter, 1 cup All-Purpose Flour, ¼ cup Powdered Sugar
While the shortbread layer chills, adjust the oven rack to the 2nd level position (just above center) and preheat the oven to 350ºF.
Place the pan in the oven and bake for 15-18 minutes at 350ºF or until it's light golden brown.
Remove from the oven and allow to cool slightly while you prepare the lemon curd filling. You can choose to leave the oven on, or you can turn it off while you make the lemon curd filling. If you turn it off, remember to preheat it again to 350ºF.
lemon curd filling
Grate a lemon with a fine grater, adding the zest to a small bowl. Then cut each lemon in half and with a lemon juicer, squeeze out the lemon juice from each lemon. Sift the all-purpose flour into a small bowl.
Using a hand mixer or a stand mixer fitted with a whisk attachment, mix together the lemon juice, lemon zest, eggs, granulated sugar, and all-purpose flour on medium-high speed until well blended.
½ cup Lemon Juice, 1 tablespoon Lemon Zest, 3 Large Eggs, 1 ½ cups Granulated Sugar, ½ cup All-Purpose Flour
Pour the lemon curd filling into the slightly cooled crust, then place back into the oven to bake for 25-30 minutes at 350ºF or until the top is almost set with the center jiggling a little. I recommend checking on them at the earliest recommended baking time to start.Note: Leaving them in too long can cause a thin crust to form over the top. The lemon bars are still good though if this happens!
Remove from the oven and allow lemon bars to cool completely. Then cover and place into the refrigerator to chill and set for a minimum of 1 hour (overnight is my preference). When ready to serve, dust with powdered sugar and cut using a well-sharpened knife.
Powdered Sugar
Keep lemon bars stored in an airtight container in the refrigerator for up to 5 days.
Video
Notes
The 48-minute cook time noted above combines the longest baking time for both the shortbread crust (18 minutes) and the final baking time for both layers (30 minutes).
If you'd like, you can spray the pan, then place a parchment paper sling into the pan, which can help make for easier cutting later. To prevent the sides from collapsing into the bars during baking, you can place a small dab of the lemon filling in between the parchment paper and baking tin, or you can use metal (not plastic) binder clips.
You may notice a small amount of the lemon filling fall behind or slightly under the parchment paper sling (if you use one) during baking. This is okay—it happens to me when I make them sometimes. Please note, this does not mean the lemon filling moves entirely underneath the crust.
Overbaking the lemon bars for too long can cause a thin crust to form over the top. You can try to pick it off, or do what I've done and dust on some powdered sugar because they're still good!
To prevent the powdered sugar topping from melting, you can use King Arthur's non-melting powdered sugar. I love it for desserts like this and my dark chocolate crinkle cookies!
Recipe is adapted from my Grammy's lemon bars recipe.
Recipe updated 9/30/2022 with updated recipe notes.