Name: Tangy Lemon Rhubarb Bars for a Refreshing Summer Treat
Prep time: 15 min
Cook time: 40 min
Total time: 60 min
Ingredients: 1 cup Butter (softened); 1/2 cup Sugar; 1 1/2 cups All-purpose or whole wheat flour; 1/4 tsp Salt; 1 cup Sugar (for topping); 1/4 cup All-purpose flour (for topping); 1 tsp Baking powder; 3 large Eggs; 1 tbsp Lemon zest (fresh); 1/3 cup Lemon juice (fresh squeezed); 2 cups Fresh or frozen rhubarb (finely chopped); 1 cup Icing sugar (for sprinkling)

You know that moment when spring hits, and the world wakes up with vibrant colors and fresh scents? That’s exactly how I feel each time I dive into these Refreshingly Tart Lemon Rhubarb Bars. Bursting with zesty lemon and the unique tang of rhubarb, this dessert is like a celebration of the season. With a buttery, crumbly crust and a smooth, custard-like topping, these bars are not just a feast for the eyes but also a crowd-pleaser. Whip them up in no time for brunches or picnics, and feel free to explore variations—like adding berries or making them gluten-free. Trust me, once you taste that perfect balance of sweet and tart, you’ll be dreaming of spring all year round! Curious to learn how to make these delightful bars? Let’s get started!

Why make Lemon Rhubarb Bars?

Bright, Refreshing Flavor: The combination of zesty lemon and tangy rhubarb creates a uniquely refreshing taste that’s perfect for spring and summer gatherings.
Easy to Customize: Whether you prefer traditional lemony goodness or want to add berries, these bars can be tailored to suit any palate.
Quick and Simple: Whip these up in under an hour, making them an ideal choice for impromptu gatherings or as a sweet treat after dinner.
Crowd-Pleasing Delight: Serve them at brunch or picnics, and watch them disappear—everyone will want the recipe!
Nutritious Twist: With options for whole wheat and gluten-free variations, you can enjoy these bars guilt-free. If you’re looking for more delicious desserts, check out our Spring Desserts for other seasonal favorites!

Lemon Rhubarb Bars Ingredients

• Get ready to create a delightful treat!

For the Crust

Butter (softened) – Provides richness and moisture to the base. Substitute with margarine for a dairy-free option.
Sugar – Adds sweetness to both the base and topping. Can be reduced slightly for a less sweet taste if preferred.
All-purpose or whole wheat flour – Serves as the structural base. Whole wheat flour can be used for a nuttier taste.
Salt – Enhances overall flavor. Always use a pinch in sweet baking recipes.

For the Filling

Sugar (topping) – Sweetens the tangy filling. Use less if a tart flavor is desired.
All-purpose flour (topping) – Thickens the filling and aids in texture. No substitute needed unless gluten-free is desired.
Baking powder – Helps the filling rise slightly. Ensure it’s fresh for optimal leavening.
Eggs – Provides structure and moisture to the topping. Can substitute with flax eggs for a vegan alternative.
Lemon zest – Infuses the filling with bright citrus flavor. Fresh is best for intensity.
Lemon juice – Adds acidity and tang to the bars. Fresh squeezed is preferable, but bottled can work in a pinch.
Fresh or frozen rhubarb (finely chopped) – The stars of the show; offers a fruity, tart element. If using frozen, do not thaw before adding.

For the Topping

Icing sugar (for sprinkling) – Finely dusts the finished bars for a decorative touch. Optional but enhances presentation.

Step‑by‑Step Instructions for Lemon Rhubarb Bars

Step 1: Preheat and Prepare
Begin by preheating your oven to 350°F (175°C). While it heats up, grease an 8×8-inch baking dish with butter or line it with parchment paper for easy removal later. This crucial step will ensure your Lemon Rhubarb Bars bake evenly and don’t stick to the pan.

Step 2: Cream the Base Ingredients
In a mixing bowl, combine softened butter and sugar. Use an electric mixer to cream them together on medium speed until the mixture is light and fluffy, about 2-3 minutes. This process is important as it aerates the ingredients, contributing to the light texture of the crust.

Step 3: Make the Crust
Gradually incorporate all-purpose or whole wheat flour and a pinch of salt into the creamed mixture. Mix until the dough forms a crumbly texture, then press it evenly into the prepared baking dish. Bake the crust for 10-12 minutes until it turns a light golden brown; this creates a sturdy base for your Lemon Rhubarb Bars.

Step 4: Cool the Crust
Once baked, remove the crust from the oven and let it cool slightly for about 5 minutes. This cooling period is essential before pouring on the lemon filling, as it prevents the filling from cooking further and becoming too firm.

Step 5: Whisk Together Filling Ingredients
In a separate bowl, whisk together the sugar (for the topping), all-purpose flour, baking powder, salt, eggs, lemon zest, and lemon juice. Mix until the ingredients are well combined and the mixture is smooth. This step creates the flavorful custard texture of the topping for your Lemon Rhubarb Bars.

Step 6: Fold in the Rhubarb
Gently fold in the finely chopped fresh or frozen rhubarb into the filling mixture. Make sure to combine it evenly without overmixing, as this ensures that every bite of your Lemon Rhubarb Bars has a delightful burst of tart rhubarb flavor.

Step 7: Pour the Filling
Pour the rhubarb filling over the pre-baked crust, spreading it out evenly with a spatula. This creates a luscious layer on top of the sturdy base. Make sure to cover the crust fully for an even bake and presentation when served.

Step 8: Bake Until Set
Return the dish to the oven and bake the Lemon Rhubarb Bars for 35-40 minutes. Look for the edges to turn golden and the filling to set; it should still have a slight jiggle in the center. This careful baking is what gives these bars their creamy, custard-like filling.

Step 9: Cool and Dust
Once baked, remove the bars from the oven and let them cool completely in the dish set on a wire rack. After cooling, dust the top with icing sugar before slicing. This final touch not only adds sweetness but also elevates the presentation of your Lemon Rhubarb Bars.

Expert Tips for Lemon Rhubarb Bars

Room Temperature Eggs: Ensure eggs are at room temperature before using to achieve a smooth, creamy filling that sets perfectly.
Preventing Excess Moisture: If using frozen rhubarb, don’t thaw it before adding to the filling, as this can lead to a soggy texture in your Lemon Rhubarb Bars.
Chill for Clean Cuts: For neat slices, chill the baked bars in the refrigerator for at least an hour before cutting; this helps maintain their structure.
Adjusting Sweetness: Feel free to reduce the sugar in the topping for a less sweet filling, especially if you prefer a tarter flavor from the rhubarb.
Baking Time Matters: If doubling the recipe, be mindful to adjust baking times, checking for doneness based on the size of your baking pan.

Make Ahead Options

These Lemon Rhubarb Bars are ideal for meal prep, allowing busy home cooks to enjoy a delightful dessert with ease! You can prepare the crust up to 24 hours in advance; simply bake it, let it cool completely, and wrap it tightly in plastic wrap or store it in an airtight container. Additionally, the filling can be combined and refrigerated for up to 3 days—just stir gently before adding it to the crust. To maintain quality, ensure any fruits are well mixed and refrigerate in a sealed container to prevent browning. When you’re ready to bake, pour the filling over the pre-baked crust and follow the baking instructions, guaranteeing that your Lemon Rhubarb Bars remain as delicious and vibrant as if made fresh!

How to Store and Freeze Lemon Rhubarb Bars

Fridge: Store Lemon Rhubarb Bars in an airtight container in the refrigerator for up to 5 days. This keeps them fresh and maintains their delightful flavor.

Freezer: For longer storage, wrap individual bars tightly in plastic wrap, then place them in a freezer-safe bag. They can be frozen for up to 2 months without losing flavor.

Thawing: When ready to enjoy, simply thaw in the refrigerator overnight or let them sit at room temperature for about an hour. Enjoy them chilled for a refreshing treat!

Reheating: If you prefer them warm, you can gently heat bars in a microwave for about 10-15 seconds, just until slightly warm.

What to Serve with Refreshingly Tart Lemon Rhubarb Bars?

Indulging in the bright, tangy flavors of these bars opens a world of delightful pairing possibilities for your next gathering.

Fresh Berries: Juicy strawberries or raspberries add a vibrant color and sweetness that complements the tartness of the bars perfectly.
Whipped Cream: A dollop of lightly sweetened whipped cream adds a luscious creaminess, balancing the zesty filling in every bite.
Iced Tea: The refreshing taste of iced tea, particularly citrus or mint-flavored varieties, enhances the bright notes of the lemon and rhubarb.
Greek Yogurt: Creamy Greek yogurt with a drizzle of honey serves as a tangy yet indulgent contrast, making for a delightful afternoon treat.
Nutty Granola: Adding a sprinkle of homemade granola brings a satisfying crunch and a touch of nuttiness that pairs beautifully with the soft texture of the bars.
Lemonade: A chilled glass of homemade lemonade resonates with the lemony notes in the dessert, creating a harmonious and refreshing experience.
Almond Biscotti: Pairing these bars with a crunchy almond biscotti adds a delightful texture, perfect for a cozy evening snack.

Each of these serving suggestions enhances the experience of your Lemon Rhubarb Bars, cheerful companions for every occasion.

Lemon Rhubarb Bars Variations

Feel free to get creative with these delicious bars to suit your taste buds!

Berry Blast:
Add chopped strawberries or raspberries for a delightful fruity twist that complements the tart rhubarb perfectly.
Whole Wheat Goodness:
Substitute all-purpose flour with whole wheat flour for a nuttier flavor that adds a healthy touch to your dessert.
Gluten-Free Delight:
Use gluten-free all-purpose flour to make these bars suitable for your gluten-sensitive friends without sacrificing taste.
Extra Tartness:
Increase the lemon juice in the filling for those who enjoy a bold tart flavor that will awaken your taste buds.
Oat Topping Crunch:
Top your bars with a light oat crumble for added texture, creating a satisfying contrast to the smooth filling.
Coconut Flour Option:
Try using coconut flour for a unique flavor and a gluten-free alternative; just adjust the liquid slightly for consistency.
Citrus Zest Medley:
Incorporate zest from oranges or limes along with the lemon for a citrusy explosion that adds layers of flavor!
Herb-Infused:
Mix in finely chopped fresh mint or basil leaves into the filling for an unexpected herbaceous note that dances on the palate.

With these variations, your Lemon Rhubarb Bars can shine in countless ways, ensuring everyone at your table discovers their perfect bite! And if you’re looking for more delightful recipes, don’t forget to explore our Summer Desserts for refreshing ideas!

Lemon Rhubarb Bars Recipe FAQs

What kind of rhubarb should I use for Lemon Rhubarb Bars?
Fresh rhubarb is best for these bars, as it provides the optimal tartness. Look for firm, brightly colored stalks without any dark spots or wilting. If fresh isn’t available, frozen rhubarb can work too; just remember not to thaw it before adding it to your filling to keep moisture at bay.

How should I store Lemon Rhubarb Bars?
Store your Lemon Rhubarb Bars in an airtight container in the refrigerator, where they will stay fresh for about 5 days. This helps maintain their delightful flavor and texture, so you can enjoy them longer. If you’re planning to keep them for a while, freezing is a great option!

Can I freeze Lemon Rhubarb Bars?
Absolutely! Wrap individual bars tightly in plastic wrap and then place them in a freezer-safe bag. They can be frozen for up to 2 months. When you’re ready to enjoy them, thaw them in the refrigerator overnight or let them sit at room temperature for about an hour. For a warm treat, you can gently microwave them for 10-15 seconds.

What can I do if my filling doesn’t set properly?
If your filling doesn’t set as expected, it may need a little more baking. Check the bars if there’s a slight jiggle in the center before taking them out; if they still seem too soft, return them to the oven for an additional 5 minutes at 350°F. Make sure to also use room temperature eggs, as they help create a smooth texture that sets nicely.

Is there a gluten-free option for Lemon Rhubarb Bars?
Yes! You can easily make these bars gluten-free by substituting the all-purpose flour with a gluten-free all-purpose flour blend. Just ensure that your baking powder is also gluten-free. Follow the recipe as usual, and you’ll have a delicious treat suitable for gluten-intolerant friends and family.

Are there any dietary considerations for pets with Lemon Rhubarb Bars?
It’s important to note that rhubarb can be toxic to dogs and cats in large quantities. If you plan on sharing these bars, be sure they are only enjoyed by humans! Always keep your pet’s diet in mind and store the bars safely away from their reach.