Indulge in the perfect combination of tart and sweet with these Rhubarb Custard Bars! With a buttery crust that crumbles beautifully, a creamy custard filling, and the bright tang of fresh rhubarb, these bars are a delightful treat for spring and summer. They’re perfect for potlucks, gatherings, or simply as a sweet finish to a family meal. Let’s dive into this scrumptious recipe!
Ingredients List
For the Crust
- 1 3/4 cups all-purpose flour
- 1/2 cup powdered sugar
- 1/2 cup unsalted butter, softened
- 1/4 teaspoon salt
For the Custard Filling
- 2 cups fresh rhubarb, diced (or frozen, thawed and drained)
- 3 large eggs
- 1 cup granulated sugar
- 1/4 cup all-purpose flour
- 1/4 teaspoon salt
- 1/2 teaspoon vanilla extract
- 1/2 cup heavy cream (or half-and-half)
Timing
- Prep Time: 20 minutes
- Cook Time: 35-40 minutes
- Total Time: 60 minutes
- Servings: Approximately 12 bars
These delightful Rhubarb Custard Bars can be prepared in under an hour, making them a great option for a spontaneous dessert!
Step-by-Step Instructions
Step 1: Prepare the Crust
- Preheat your oven to 350°F (175°C).
- In a medium bowl, combine 1 3/4 cups flour, powdered sugar, softened butter, and salt. Mix until the mixture resembles coarse crumbs.
- Press the mixture evenly into the bottom of a greased 9×9-inch baking pan. Bake for 15 minutes until lightly golden. Remove from the oven and let cool slightly.
Step 2: Prepare the Rhubarb
- While the crust is baking, rinse and dice the rhubarb into small pieces. If using frozen rhubarb, thaw and drain it well.
Step 3: Make the Custard Filling
- In a large bowl, whisk together the eggs, granulated sugar, 1/4 cup flour, salt, and vanilla extract until smooth.
- Gently stir in the heavy cream and mix until combined.
- Fold in the diced rhubarb.
Step 4: Assemble and Bake
- Pour the rhubarb custard mixture evenly over the pre-baked crust.
- Bake in the preheated oven for 35-40 minutes, or until the custard is set and a light golden color forms on top.
Step 5: Cool and Serve
- Allow the bars to cool in the pan on a wire rack for at least 30 minutes. Then refrigerate for another hour to fully set.
- Once cool, cut into squares and dust with powdered sugar for a pretty presentation.

Nutritional Breakdown (per bar)
- Calories: 180
- Protein: 3g
- Carbohydrates: 24g
- Dietary Fiber: 1g
- Total Fat: 8g
- Sodium: 90mg
These bars provide a satisfying treat while being balanced with the tangy flavor of rhubarb.
Healthy Variations & Substitutes
- Gluten-Free: Use a gluten-free all-purpose flour blend for both the crust and custard.
- Dairy-Free: Replace heavy cream with coconut cream or a nut milk for a dairy-free version.
- Sweetener Options: Substitute granulated sugar with coconut sugar or a sugar alternative for a healthier take.
Serving Suggestions
These Rhubarb Custard Bars are delicious on their own but can be enhanced by serving alongside:
- Whipped Cream: A dollop of whipped cream adds a nice touch for serving.
- Ice Cream: Vanilla or strawberry ice cream pairs beautifully with the tartness.
- Fresh Mint: Garnish with fresh mint leaves for added color and a hint of freshness.
Common Mistakes to Avoid
- Overbaking: Keep an eye on the custard while baking. It should be set but still slightly jiggly in the center.
- Using Too Much Rhubarb: Ensure you stick to the recommended amount; too much can lead to a watery filling.
- Not Cooling Properly: Allowing the bars to cool completely helps them set and makes cutting easier.
Storage & Prep Tips
To extend the freshness of your bars:
- Storage: Store leftover bars in an airtight container in the refrigerator for up to 4-5 days.
- Freezing: These bars freeze well! Cut them into squares, wrap in foil, and store in a freezer-safe container. They should keep for about 2 months. Thaw in the fridge before serving.
Conclusion
These Rhubarb Custard Bars are a delightful way to highlight the unique flavor of rhubarb, perfect for celebrating the arrival of warm weather. With their creamy custard and crisp crust, they are sure to become a favorite among family and friends. Give this easy recipe a try and enjoy the sweet, tangy treat!
FAQs
1. Can I use other fruits instead of rhubarb?
Absolutely! You can substitute rhubarb with fresh berries, peaches, or apples for a different flavor profile.
2. Can I make the custard without eggs?
While eggs provide structure, you can experiment with flax eggs or commercial egg replacers for a vegan option. The texture may differ slightly.
3. How do I know when the custard is set?
The custard should be lightly golden and firm to the touch, with only a slight jiggle when moved.
4. Is this recipe customizable?
Yes! Feel free to add zest from a lemon or orange for an extra flavor boost, or try spices like cinnamon for a twist.
5. Can these bars be made ahead of time?
Yes! The bars can be made a day ahead, and they often taste even better after sitting in the fridge overnight, allowing the flavors to meld.
Enjoy your delightful Rhubarb Custard Bars, and savor every delicious bite!