Easy Rhubarb Custard Bars

There’s something truly special about the first signs of spring, and for me, nothing says “spring is here” quite like the bright, tart stalks of rhubarb appearing at the market. These Rhubarb Cust हमारd Bars are the perfect way to celebrate the season. They start with a buttery, crumbly shortbread crust, which is then topped with a rich, creamy custard filling studded with tangy rhubarb pieces. To finish it all off, a luscious and light cream cheese frosting is spread over the top. It’s a dessert that hits all the right notes: sweet, tart, creamy, and buttery. If you’re a fan of this classic spring pairing, you’ll also adore our Strawberry Rhubarb Cheesecake Bars, which offer a delightful fruity twist.

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Contents

Why make this recipe

These bars are a guaranteed crowd-pleaser, and here’s why you’ll fall in love with them:

Perfect Flavor Balance: The tangy bite of the rhubarb cuts through the sweetness of the custard and frosting, creating a perfectly balanced dessert that isn’t overwhelmingly sweet.

Incredible Textures: From the tender-crisp shortbread crust to the silky-smooth custard and the fluffy frosting, every single bite is a delight for the senses.

Feeds a Crowd: This recipe is made in a 9×13-inch pan, yielding about 20 bars. It’s the ideal dessert for bringing to potlucks, family gatherings, or spring picnics.

Make-Ahead Friendly: You can easily prepare these bars a day in advance. In fact, they taste even better after chilling in the refrigerator, allowing the flavors to meld together beautifully.

Ingredients

• 2 cups flour
• 1/3 cup sugar
• 1 cup salted butter
• 1 1/2 cups sugar
• 1/2 cup flour
• 1 cup half and half (whole milk works fine too)
• 3 eggs
• 1 teaspoon vanilla
• 5 cups diced rhubarb
• 6 ounces cream cheese (softened)
• 1 1/2 cups powdered sugar
• 1 teaspoon vanilla
• 1 cup whipped topping

How to make Rhubarb Custard Bars

Step 1: First things first, get your oven preheating to 350°F. Take a 9×13-inch pan and line it with parchment paper, leaving a little overhang on the sides. This will act as a handle to lift the bars out easily later.

Step 2: In a large bowl, mix together the 2 cups of flour and 1/3 cup of sugar for the crust. Add the cold, salted butter. Using a fork or a pastry cutter, “cut” the butter into the flour mixture until it resembles coarse, crumbly sand.

Step 3: Press this crumbly mixture evenly and firmly into the bottom of your prepared pan. Pop it into the preheated oven and bake for 10 minutes. This pre-baking step helps ensure your crust stays crisp and doesn’t get soggy.

Step 4: While the crust is baking, it’s time to whip up the delicious filling. In another large bowl, whisk together the 1 1/2 cups of sugar, 1/2 cup of flour, half and half, eggs, and 1 teaspoon of vanilla until everything is smooth and well-combined. Gently stir in your 5 cups of diced rhubarb.

Step 5: Once the crust is out of the oven, carefully pour the rhubarb custard filling over the hot crust. Return the pan to the oven and bake for an additional 40 to 50 minutes. You’ll know it’s done when the center is mostly firm but still has a very slight jiggle to it.

Step 6: This step is crucial! Let the bars cool on a wire rack completely. I mean completely! If you try to frost them while they’re still warm, you’ll have a melted mess.

Step 7: For the frosting, make sure your cream cheese is nicely softened. In a medium bowl, whisk the softened cream cheese, powdered sugar, and the remaining 1 teaspoon of vanilla until it’s smooth and creamy. Then, gently fold in the whipped topping until just combined. You want to keep the frosting light and airy.

Step 8: Spread the glorious frosting over the completely cooled bars. Keep them refrigerated until you’re ready to slice and serve.

How to serve Rhubarb Custard Bars

These bars are best served chilled, straight from the refrigerator. The cold temperature keeps the custard firm and the frosting set perfectly. Slice them into squares and serve them on a platter for a beautiful presentation at any event. They are a wonderful treat alongside a cup of hot coffee or iced tea in the afternoon. They also make a fantastic, refreshing dessert after a hearty BBQ.

How to store Rhubarb Custard Bars

Due to the custard and cream cheese frosting, these bars must be stored in the refrigerator. Place them in an airtight container or keep them in the pan, tightly covered with plastic wrap. They will stay fresh and delicious for up to 4 days.

You can also freeze these bars for longer storage. For best results, freeze the bars unfrosted. Let them cool completely, wrap the entire slab tightly in plastic wrap and then foil, and freeze for up to 3 months. Thaw overnight in the refrigerator, then prepare and spread the frosting before serving. You can also freeze the frosted bars, though the texture of the frosting may change slightly upon thawing.

Tips to make Rhubarb Custard Bars

Use Softened Cream Cheese: For the smoothest, most luscious frosting, make sure your cream cheese is at room temperature. Cold cream cheese will result in a lumpy frosting.

Don’t Thaw Frozen Rhubarb: If you’re using frozen rhubarb, there’s no need to thaw it first. Tossing it in frozen will prevent it from releasing too much extra water and making the filling runny. You may need to add a few extra minutes to the baking time.

Patience is Key: I can’t stress this enough—let the bars cool completely. This can take a couple of hours at room temperature. Rushing this step will make slicing a mess and cause the frosting to melt.

Get Creative: If you love the combination of rhubarb and cream cheese, you should also give our amazing Rhubarb Dream Bars Recipe a try! It’s another fantastic way to enjoy this seasonal star.

FAQs About Rhubarb Custard Bars

Is rhubarb a fruit or a vegetable?

Botanically speaking, rhubarb is a vegetable. However, in the culinary world (and legally in the United States since 1947!), it’s treated as a fruit because of its popular use in sweet pies, jams, and desserts like these bars.

Why are my custard bars runny?

There are two common culprits for runny bars. First, they might be underbaked. The filling should be set, meaning the center only has a very slight wobble when you gently shake the pan. Second, they weren’t cooled completely before slicing. The custard needs time to chill and firm up properly.

Can I use a different crust?

Absolutely! While the shortbread crust is classic and delicious, you could substitute a graham cracker crust or even a crust made from crushed vanilla wafers for a different flavor profile.

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Final Thoughts

These Rhubarb Custard Bars are a true celebration of spring’s bounty. The combination of the buttery crust, tangy rhubarb custard, and sweet cream cheese frosting creates a dessert that is simply unforgettable. They are easy to make, perfect for sharing, and a wonderful way to welcome the warmer weather. Give this recipe a try, and I promise it will become a new seasonal favorite in your home!

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