A sunny afternoon filled with laughter and the sweet scent of citrus always brings back fond memories of cozy family gatherings. Homemade Lemon Rhubarb Bars capture that essence perfectly, combining zesty lemon and tangy rhubarb in a delightful treat that takes only 15 minutes of hands-on time. The buttery crust paired with the vibrant filling makes these bars irresistible.

This recipe is ideal for anyone looking to brighten up a picnic, potluck, or family dessert night. They can be made a day in advance and stored for an easy, refreshing dessert when you need it most.
Why You’ll Love This Recipe
- The buttery crust provides a rich, flaky texture that contrasts beautifully with the soft filling.
- A balance of sweet and tart flavors creates a refreshing taste for warm days.
- Quick to prepare, the whole process takes just around 45 minutes to bake and cool.
- Perfect for using up rhubarb from your garden or the farmer’s market.
What You’ll Need
Here’s what you’ll need to create these delicious lemon rhubarb bars.
For the Crust
- 1 cup all-purpose flour
- 1/2 cup unsalted butter, softened
- 1/4 cup sugar
- 1/4 teaspoon salt
For the Filling
- 1 cup rhubarb, chopped
- 1 cup lemon juice
- 1 cup sugar
- 3 large eggs
- 1/4 cup all-purpose flour
- 1/4 teaspoon baking powder
- Zest of 1 lemon
Use fresh rhubarb for the best flavor.
Substitutions & Swaps
- Use coconut oil for a dairy-free version.
- Substitute lime juice for lemon juice for a different flavor.
- Maple syrup can replace sugar for a more natural sweetener.
- Whole wheat flour can be used for added nutrition.
How to Make It
Let’s get started on your lemon rhubarb bars!
1. Preheat
Preheat the oven to 350°F (175°C). Grease a baking dish to prevent sticking.
2. Prepare the Crust
In a bowl, mix 1 cup all-purpose flour, 1/2 cup softened butter, 1/4 cup sugar, and 1/4 teaspoon salt until crumbly. Press the mixture into the bottom of the prepared baking dish.
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3. Make the Filling
In another bowl, combine 1 cup chopped rhubarb, 1 cup lemon juice, 1 cup sugar, 3 large eggs, 1/4 cup all-purpose flour, 1/4 teaspoon baking powder, and the zest of 1 lemon. Pour this mixture over the crust evenly.
4. Bake
Bake for 30-35 minutes or until set. Allow to cool completely before cutting into bars.
5. Serve
Serve chilled or at room temperature for the best flavor.
How to Store It
Fridge: Store in an airtight container for up to 5 days.
Freezer: Yes, they freeze well for up to 3 months.
Reheat: Enjoy straight from the fridge or at room temperature.
Tips for Best Results
- Ensure your butter is softened for easy mixing and a tender crust.
- Use fresh rhubarb for a vibrant taste and texture.
- Let the bars cool completely to achieve clean cuts.
- Adjust sugar levels based on the tartness of your rhubarb.
Serving Suggestions
- Serve alongside a scoop of vanilla ice cream for a delightful dessert.
- Pair with a cup of herbal tea for a cozy afternoon treat.
- Enjoy at a garden party as a refreshing seasonal dessert.
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