How to Make the Best Rhubarb Custard Bars from Scratch

Written By Sophie Dalton

I’m a passionate home cook and flavor explorer. I believe food is about more than taste—it’s about joy, creativity, and sharing special moments.

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

  1. Preheat your oven to 350°F (175°C).
  2. In a medium bowl, combine 1 3/4 cups flour, powdered sugar, softened butter, and salt. Mix until the mixture resembles coarse crumbs.
  3. 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

  1. 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

  1. In a large bowl, whisk together the eggs, granulated sugar, 1/4 cup flour, salt, and vanilla extract until smooth.
  2. Gently stir in the heavy cream and mix until combined.
  3. Fold in the diced rhubarb.

Step 4: Assemble and Bake

  1. Pour the rhubarb custard mixture evenly over the pre-baked crust.
  2. 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

  1. 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.
  2. 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

  1. Overbaking: Keep an eye on the custard while baking. It should be set but still slightly jiggly in the center.
  2. Using Too Much Rhubarb: Ensure you stick to the recommended amount; too much can lead to a watery filling.
  3. 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!