If you’re looking for a unique and delicious dessert that’s perfect for spring and summer, Rhubarb Custard Bars are the answer. These bars feature a buttery shortbread crust, a creamy custard filling, and a tangy rhubarb topping, creating a delightful balance of flavors and textures. Whether you’re hosting a gathering or simply craving a sweet treat, these bars are sure to impress.
In this article, we’ll explore why you’ll love this recipe, provide a step-by-step guide, answer frequently asked questions, and share tips to make the best Rhubarb Custard Bars. Let’s get started!
Why You’ll Love Rhubarb Custard Bars
Here are just a few reasons why this recipe is a must-try:
- Sweet and Tangy: The combination of creamy custard and tart rhubarb creates a perfectly balanced flavor.
- Easy to Make: With simple ingredients and straightforward steps, this recipe is beginner-friendly.
- Perfect for Sharing: These bars are ideal for potlucks, picnics, or dessert tables.
- Seasonal Favorite: Rhubarb is a spring and summer staple, making these bars a seasonal delight.
Step-by-Step Guide to Making Rhubarb Custard Bars
Follow this detailed guide to create the perfect Rhubarb Custard Bars.
Step 1: Preparation
Before you start, gather all the necessary ingredients and tools:
Ingredients:
For the Crust:
- 1 1/2 cups all-purpose flour
- 1/2 cup powdered sugar
- 3/4 cup unsalted butter, cold and cubed
For the Filling:
- 2 cups rhubarb, chopped into small pieces
- 1 1/2 cups granulated sugar
- 1/4 cup all-purpose flour
- 3 large eggs
- 1/4 tsp salt
- 1 tsp vanilla extract
Tools:
- 9×13 inch baking pan
- Mixing bowls
- Whisk
- Measuring cups and spoons
- Parchment paper
Preheat your oven to 350°F (175°C) and line the baking pan with parchment paper, leaving an overhang for easy removal.

Step 2: Making the Crust
- Combine Ingredients: In a mixing bowl, whisk together the flour and powdered sugar. Add the cold, cubed butter and use a pastry cutter or your hands to mix until the mixture resembles coarse crumbs.
- Press into Pan: Press the crust mixture evenly into the bottom of the prepared baking pan.
- Bake the Crust: Bake for 15–20 minutes, or until lightly golden. Remove from the oven and let it cool slightly while you prepare the filling.
Step 3: Making the Filling
- Prepare the Rhubarb: Spread the chopped rhubarb evenly over the baked crust.
- Mix the Custard: In a mixing bowl, whisk together the sugar, flour, eggs, salt, and vanilla extract until smooth.
- Pour Over Rhubarb: Pour the custard mixture over the rhubarb, spreading it evenly.
Step 4: Baking
- Bake the Bars: Return the pan to the oven and bake for 35–40 minutes, or until the custard is set and the edges are lightly golden.
- Cool Completely: Let the bars cool completely in the pan on a wire rack before slicing.
Step 5: Serving
- Slice and Serve: Use the parchment paper overhang to lift the bars out of the pan. Cut into squares and serve.
- Optional Toppings: Add a dusting of powdered sugar or a dollop of whipped cream for extra flair.
Tips for Making the Best Rhubarb Custard Bars
To ensure your bars turn out perfectly every time, keep these tips in mind:
- Use Fresh Rhubarb: Fresh rhubarb provides the best flavor and texture. If using frozen rhubarb, thaw and drain it well to avoid excess moisture.
- Don’t Overmix the Custard: Overmixing can incorporate too much air, leading to a bubbly filling. Mix just until combined.
- Chill Before Slicing: For cleaner slices, chill the bars in the refrigerator for 1–2 hours before cutting.
- Adjust Sweetness: If your rhubarb is particularly tart, you can increase the sugar by 1/4 cup.
Common Mistakes to Avoid When Preparing Rhubarb Custard Bars
Even the simplest recipes can go wrong if you’re not careful. Here are some common pitfalls to avoid:
- Overbaking: Overbaking can cause the custard to crack. Bake just until the center is set but still slightly jiggly.
- Skipping the Parchment Paper: Lining the pan with parchment paper makes it easier to remove and slice the bars.
- Using Too Much Rhubarb: Overfilling the bars can make them difficult to slice and result in a soggy crust.
FAQs About Rhubarb Custard Bars
Here are answers to some of the most frequently asked questions about this recipe:
Q: Can I use frozen rhubarb?
A: Yes, but make sure to thaw and drain it well to remove excess moisture.
Q: Can I make these bars ahead of time?
A: Yes, you can bake the bars a day in advance and store them in the refrigerator. Serve them chilled or at room temperature.
Q: How do I store leftovers?
A: Store any leftover bars in the refrigerator, covered with plastic wrap or foil, for up to 3 days.
Q: Can I add strawberries to these bars?
A: Absolutely! Strawberries pair beautifully with rhubarb. Use 1 cup of rhubarb and 1 cup of strawberries for a classic combination.
Conclusion
Rhubarb Custard Bars are a sweet, tangy, and creamy dessert that’s perfect for spring and summer. With their buttery crust, creamy custard, and tart rhubarb, they’re a treat that’s sure to impress. Whether you’re serving them at a gathering or enjoying a square as an afternoon snack, these bars are a winner.
So, grab your ingredients, preheat your oven, and enjoy a dessert that’s as enjoyable to make as it is to eat. Don’t forget to share your creations with friends and family—they’ll be asking for the recipe in no time!
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Rhubarb Custard Bars: A Sweet and Tangy Dessert Delight
- Total Time: 20 mins
Description
Treat yourself to these delightful rhubarb custard bars, combining the tangy flavor of rhubarb with a smooth custard filling. Perfect for family gatherings or as a sweet indulgence, these bars are sure to impress with their unique taste and creamy texture.
Ingredients
2 cups all-purpose flour
1/4 cup granulated sugar
1 cup cold butter, cubed
3 large eggs
2 cups granulated sugar
1/2 cup all-purpose flour
1/2 tsp salt
1 cup heavy cream
5 cups rhubarb, diced
Instructions
Preheat your oven to 350°F (175°C).
In a large bowl, combine 2 cups flour and 1/4 cup sugar. Cut in the cold butter until the mixture resembles coarse crumbs.
Press the mixture into the bottom of a greased 9×13-inch baking dish.
Bake the crust in the preheated oven for 10 minutes.
Meanwhile, in a large bowl, whisk together the eggs, 2 cups sugar, 1/2 cup flour, salt, and heavy cream until smooth.
Fold in the diced rhubarb.
Pour the custard mixture over the partially baked crust.
Return the dish to the oven and bake for an additional 40-45 minutes, or until the custard is set and the top is lightly golden.
Let the bars cool completely before cutting into squares and serving.
Notes
Enjoy these rhubarb custard bars for a delightful blend of tangy and sweet flavors in every bite. Perfect for any dessert lover!