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Lemon Cookie Bars stacked on each other on a plate.
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5 from 3 votes

Lemon Cookie Bars

You'll love these bright and tangy Lemon Cookie Bars with a buttery shortbread crust, topped with luscious, melt in your mouth lemon filling.
Prep Time20 minutes
Cook Time40 minutes
Total Time1 hour
Course: Dessert
Cuisine: American
Diet: Low Lactose
Servings: 15 squares
Author: Bailey

Equipment

  • 9x13 baking dish or something similar in size
  • parchment paper

Ingredients

Shortbread Crust

  • 1 cup unsalted butter, softened
  • 2 cups all purpose flour
  • cup white sugar
  • ¼ tsp salt
  • 2 tsp vanilla extract

Lemon Curd Filling

  • cup white sugar
  • 6 large eggs
  • 4 Tbsp all purpose flour
  • 3 Tbsp lemon zest
  • 1 cup lemon juice fresh only! about 4-5 lemons
  • cup confectioners sugar optional for topping

Instructions

  • Preheat the oven to 350°F Line the bottom and sides of a 9x13 glass baking dish with parchment paper, leaving an overhang on the sides to lift the finished bars out. Set aside.
  • Make the shortbread crust. Mix softened butter, sugar, vanilla extract, and salt together in a medium bowl. Add the flour and stir to completely combine. The dough will be thick and a bit crumbly.
  • Press it down firmly into prepared pan, making sure the layer of crust is nice and even. Bake for 22-25 minutes or until the edges are slightly browned. Remove from the oven. Gently poke some holes in the crust with a fork.
  • Make the lemon curd. Using a mesh stainer, sift the flour and the sugar to help prevent clumping. Whisk in the eggs, then the lemon juice until completely combined.
  • Pour the lemon curd over the warm crust. Bake the bars for 22-24 minutes or until the center is relatively set and no longer jiggles. (Give the pan a little shake with an oven mitt to test.) It's okay if they are still slightly jiggly, they will set in the refrigerator more.
  • Remove bars from the oven and cool completely at room temperature. I usually cool them for about 1 hours at room temperature, then stick in the refrigerator for 1-2 more hours until pretty chilled. I recommend serving chilled.
  • Dust with confectioners’ sugar and cut into squares before serving. For neat squares, wipe the knife clean between each cut. Enjoy!

Notes

  • Be sure to only use fresh lemon juice! Lemons are the star ingredient.
  • Use Parchment. The parchment paper makes it very easy to remove from the pan but in a pinch you can use foil instead.
  • Don't Overcook! if your bars seem not quite done when you pull them from the oven. They will continue to set as they cool down. 
  • Lemon bars are a great make ahead dessert. Cut then freeze on a baking try. Wrap individually and store in your freezer for up to three months. You can wait and dust with powdered sugar before serving. 
  • Store in an airtight container for up to 6 days in the fridge or freeze for up to 2 months. 

Nutrition

Serving: 1square | Calories: 302kcal | Carbohydrates: 39g | Protein: 5g | Fat: 14g | Saturated Fat: 8g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 4g | Trans Fat: 1g | Cholesterol: 107mg | Sodium: 70mg | Potassium: 71mg | Fiber: 1g | Sugar: 24g | Vitamin A: 488IU | Vitamin C: 8mg | Calcium: 21mg | Iron: 1mg