When spring arrives, my kitchen practically sings for the tart, vibrant magic of rhubarb. Those ruby-red stalks are pure joy, and honestly, nothing celebrates them better than these incredible Rhubarb Custard Bars.
I think of the rhubarb patch at my grandparents’ farm, its sweet-tart aroma from Grandma’s kitchen always bringing back the coziest feelings of childhood summers.
Those cherished memories truly inspired these bars, blending comfort and brightness perfectly. If you love unique bakes, you might also adore my matcha doughnuts with almond glaze.
What You Need to Make This Recipe
For these Rhubarb Custard Bars, a few ingredients truly shine. The fresh rhubarb, of course, provides that signature tartness that makes the dessert so refreshing, perfectly balanced by the creamy custard. We’re using eggs and milk for that rich, silky filling, much like how I might create a vibrant mango curd. And don’t forget the butter in the shortbread crust – it gives it that irresistible, melt-in-your-mouth texture that forms the perfect base for all that bright, tangy goodness.
How to Make Rhubarb Custard Bars
Making these bars is a lovely journey! You’ll start by pressing the buttery shortbread crust into the pan, a simple step that sets the stage. As it bakes, your kitchen will fill with the most comforting aroma, hinting at the goodness to come. Then, you whisk together the creamy custard, a beautiful golden mixture that embraces the diced rhubarb. Pouring it over the partially baked crust feels like painting a masterpiece, and then it’s back into the oven, where the custard slowly sets and the rhubarb softens, making for delightful rhubarb cream cheese bars.
Pro Tips
When cutting your rhubarb, aim for even, small pieces, about half an inch. This ensures each bite gets that perfect tart burst and allows the rhubarb to cook down evenly within the custard, preventing tough bits.
Don’t overbake the custard! You want it to be mostly set but still have a slight jiggle in the center when you pull it out. It will continue to set as it cools, leading to that wonderfully creamy, melt-in-your-mouth texture in your Rhubarb Custard Bars.
Allow the bars to cool completely, and I mean completely, before slicing. This patience is key because it gives the custard ample time to firm up, resulting in clean, beautiful slices that hold their shape.
My Secret Trick: Sprinkle a teaspoon of cornstarch over your diced rhubarb before adding it to the custard mixture. This little trick helps absorb any excess moisture the rhubarb releases, preventing a watery custard layer.
How to Store Rhubarb Custard Bars
- Refrigerate Rhubarb Custard Bars in an airtight container for up to 3-4 days.
- For longer storage, freeze individual bars wrapped tightly in plastic wrap, then placed in a freezer-safe bag or container, for up to 2 months.
- Thaw frozen bars in the refrigerator overnight or at room temperature for an hour before serving.
Nutritional Benefits
While these Rhubarb Custard Bars are a delightful indulgence, they also offer a few pleasant surprises. Rhubarb itself is packed with dietary fiber, which is great for digestion, and provides a good source of Vitamin K. The eggs in the custard contribute protein and essential vitamins, making for a treat that feels a little less guilty and a lot more satisfying.
FAQs
What kind of pan should I use for these bars?
I find a 9×13 inch baking pan works perfectly for these Rhubarb Custard Bars. A glass or ceramic pan often provides more even baking, ensuring your crust is perfectly golden and your custard sets beautifully without overcooking the edges.
Can I use frozen rhubarb?
Absolutely, you can use frozen rhubarb! Just make sure to thaw it completely and drain any excess liquid very well. Too much moisture can make your custard watery, so a good squeeze with a paper towel is crucial here.
How do I know when the custard is fully set?
The custard is usually set when the edges appear firm and slightly puffed, but the very center still has a slight, gentle jiggle when you carefully nudge the pan. It will continue to firm up as it cools completely on the counter.
Can I add a crumble topping instead of just custard?
While this recipe features a classic smooth custard, I’ve certainly experimented with a crumble topping on similar bakes. You could add a simple oat or flour-based crumble over the custard before baking for an extra textural contrast.
Rhubarb Custard Bars
Ingredients
Equipment
Method
- Preheat your oven to 375°F (190°C). Lightly grease a 9x13 inch baking pan; a light spray with cooking oil or a thin layer of butter works perfectly.
- In a medium bowl, combine 1.5 cups all-purpose flour and 0.5 cup granulated sugar. Add the cold cubed butter and cut it in with a pastry blender, a fork, or your fingertips until the mixture resembles coarse crumbs. Press this mixture evenly into the bottom of the prepared baking pan. Bake for 15-18 minutes, or until the crust is lightly golden around the edges.
- While the crust is baking, prepare your rhubarb filling. In another medium bowl, gently toss the chopped rhubarb with 0.5 cup granulated sugar, 2 tablespoons all-purpose flour, and 1 tablespoon fresh lemon juice. Set this aside.
- In a separate bowl, whisk together the 3 large eggs, 0.75 cup granulated sugar, 0.5 cup heavy cream, 1 teaspoon vanilla extract, and 0.25 teaspoon salt until everything is well combined and slightly frothy. You're aiming for a smooth, uniform mixture here.
- Once the shortbread crust has finished its initial bake, carefully remove it from the oven. Reduce the oven temperature to 350°F (175°C). Evenly spread the prepared rhubarb mixture over the warm crust. Then, carefully pour the custard topping over the rhubarb, ensuring it covers everything nicely.
- Return the pan to the preheated 350°F (175°C) oven and bake for another 35-45 minutes. The bars are ready when the custard is set (it shouldn't jiggle much in the center) and the edges are lightly golden. A knife inserted near the center should come out clean. Let the bars cool completely on a wire rack at room temperature.
- Once cooled to room temperature, transfer the pan to the refrigerator and chill for at least 2 hours before cutting into squares and serving. Chilling helps the bars set perfectly and makes for cleaner slices.
Notes
If fresh rhubarb isn't available, you can use frozen rhubarb. Do not thaw it; simply toss with the sugar and flour mixture directly from frozen, adding an extra tablespoon of flour if the mixture seems overly wet.
These bars can be made a day ahead and stored in an airtight container in the refrigerator. They're excellent cold!
Conclusion
There’s truly something magical about these bars, aren’t there? That incredible burst of tart rhubarb, enveloped in a silky-smooth custard, all sitting on a buttery shortbread crust – it’s pure spring joy in every bite. I hope these Rhubarb Custard Bars bring as much delight to your home as they do to mine. For another classic, don’t miss my rhubarb custard tart.
