Lady Bird Johnson’s Lemon Squares Copycat Recipe

Lady Bird Johnson’s Lemon Squares are a classic, tangy dessert with a buttery shortbread crust and a bright, lemony filling. Perfect for summer gatherings, tea, or casual dessert, these squares are sweet, tart, and easy to serve in individual portions.

Why Everyone Will Love This Recipe

The combination of a rich, buttery crust with zesty lemon filling makes these squares irresistible. Dusting with powdered sugar adds a delicate sweetness, and the texture is soft, tender, and perfectly balanced between crust and filling.

What Is the Dish?

A classic lemon dessert with a shortbread crust and a tart, smooth lemon custard-like filling. This copycat recipe recreates Lady Bird Johnson’s famed lemon squares from her historical family recipes.

Cooking Tips

• Use freshly grated lemon zest and juice for a bright, fresh flavor.
• Pat the crust evenly in the pan to ensure uniform baking.
• Bake the filling just until set for a creamy texture.
• Allow squares to cool completely before cutting to prevent filling from running.

Frequently Asked Questions

Can I Use a Different Pan Size?

A 10×15-inch jelly roll pan is ideal, but you can use a similar size pan. Adjust baking time slightly for depth.

Can I Make This Ahead?

Yes, lemon squares can be made a day in advance and stored covered at room temperature or refrigerated.

Can I Reduce Sugar?

Yes, slightly reduce sugar in the filling for a less sweet version; taste before baking.

Can I Freeze Lemon Squares?

Yes, fully baked lemon squares can be frozen for future use.

Is This Recipe Gluten-Free?

Not as written; use a gluten-free flour blend for both crust and filling to adapt.

How to Store

Store cooled lemon squares in an airtight container at room temperature for up to 3 days. If you prefer, refrigerate for up to 5 days for longer freshness. Dust with powdered sugar just before serving.

How to Freeze

Freeze fully baked and cooled lemon squares in a single layer, wrapped in plastic wrap and stored in a freezer-safe container for up to 2 months. Thaw in the refrigerator overnight before serving.

Ingredients

For the Crust:

• 2 cups all-purpose flour
• ¼ cup sugar
• 1 cup butter, softened

For the Filling:

• 2 cups sugar
• 1 tsp baking powder
• 4 tbsps all-purpose flour
• 3 eggs, well beaten
• 1 + ½ tablespoons freshly grated lemon zest
• ⅓ cup freshly squeezed lemon juice

For Finishing:

• Powdered sugar, for dusting

How to Make Lady Bird Johnson's Lemon Squares

1. Set oven to 350°F (175°C). Grease a 10×15-inch jelly roll pan.
2. Combine butter and sugar. Cut together until well blended. Slowly mix in flour to form dough. Press evenly into the pan.
3. Bake 15 minutes or until lightly browned. Cool while preparing filling.
4. In a bowl, mix sugar, baking powder, and flour. Stir in eggs, lemon juice, and zest until combined.
5. Pour filling over baked crust. Bake 15–20 minutes, or until filling sets.
6. Let lemon squares cool completely. Dust with powdered sugar and cut into squares or diamonds.