Rhubarb Dream Bars
These Rhubarb Dream Bars feature a buttery shortbread crust topped with a luscious, tangy-sweet rhubarb custard filling that bakes up perfectly every time. A nostalgic spring and summer dessert the whole family will love.
The Dreamy Rhubarb Bar You Have Been Waiting For
If rhubarb season rolls around and you are not sure what to do with that armful of ruby-red stalks from the garden or the farmers market, this is your answer. Rhubarb Dream Bars are a classic Midwestern-style bar cookie that have been gracing church potlucks and family reunions for decades, and for very good reason. A tender, melt-in-your-mouth shortbread crust acts as the foundation for a silky, tangy-sweet rhubarb custard filling that puffs up golden in the oven and settles into something genuinely magical as it cools.
This is the kind of dessert that makes people ask for the recipe before they have even finished their first bar.
Why This Recipe Works
A lot of rhubarb bar recipes result in a filling that is too runny, too tart, or strangely gummy. This version avoids all of that by doing a few things right:
- Pre-baking the crust keeps it crisp and buttery rather than soggy under the wet filling.
- A touch of heavy cream in the custard gives the filling that lush, creamy body that earns the name dream bars.
- Finely chopping the rhubarb rather than leaving it in large chunks ensures every single bite has that gorgeous tart flavor woven through the custard, not just in random pockets.
- Cooling completely before slicing is non-negotiable. Patience here pays off in perfectly clean, bakery-worthy cuts.
Chef's Tip: Rhubarb varies a lot in tartness depending on the variety and time of season. If your stalks are on the very sour side, you can nudge the granulated sugar up to 1.5 cups without changing anything else.
Choosing Your Rhubarb
Fresh is always best here. Look for firm, brightly colored stalks with a deep red or pink hue. The redder the stalk, the more visual impact in the finished bars. Green rhubarb tastes just as good, though your filling will be more pale gold than pink-tinged.
Always discard the leaves. Rhubarb leaves are toxic and should never be eaten.
If fresh rhubarb is out of season, frozen rhubarb is a perfectly respectable substitute. Just make sure to thaw it fully and pat it very dry before using.
Having the right baking pan and a good pastry cutter genuinely changes the result here. A light-colored metal 9x13 pan bakes the crust evenly without over-browning, and a sharp pastry cutter makes the shortbread come together in under two minutes.
Tools & Ingredients We Recommend
Tips for the Perfect Shortbread Crust
The crust is simple, but cold butter is essential. Warm or melted butter will give you a greasy, dense base instead of a crumbly, tender shortbread. Cut your butter into small cubes and pop it back into the fridge for five minutes if your kitchen is warm.
When pressing the crust into the pan, use the bottom of a flat measuring cup to get an even layer. Uneven crust means some parts will overbake while others stay pale and soft.
Ready to bake up a pan of these beauties? Here is everything you need:
Rhubarb Dream Bars
These Rhubarb Dream Bars feature a buttery shortbread crust topped with a luscious, tangy-sweet rhubarb custard filling that bakes up perfectly every time. A nostalgic spring and summer dessert the whole family will love.
Ingredients
- 1 1/2 cups all-purpose flour, divided
- 1/4 cup powdered sugar, for crust
- 1/2 cup unsalted butter, cold, cut into cubes
- 1 1/4 cups granulated sugar, for filling
- 3 large eggs, room temperature
- 3 cups fresh rhubarb, trimmed and finely chopped
- 1/4 cup heavy cream
- 1 tsp vanilla extract, pure
- 1/4 tsp salt
- 2 tbsp powdered sugar, for dusting on top
Instruction
Preheat your oven to 350 degrees F (175 degrees C). Grease a 9x13-inch baking pan and line it with parchment paper, leaving an overhang on two sides for easy lifting.
Make the shortbread crust: In a medium bowl, whisk together 1 cup of the flour and the powdered sugar. Cut in the cold butter using a pastry cutter or your fingertips until the mixture resembles coarse crumbs.
Press the crust mixture firmly and evenly into the bottom of the prepared pan. Bake for 12 to 15 minutes until the edges are just lightly golden. Remove from the oven and set aside.
While the crust bakes, make the filling: In a large bowl, whisk together the granulated sugar and the remaining 0.5 cup of flour. Add the eggs, heavy cream, and vanilla extract, whisking until smooth and well combined.
Fold the chopped rhubarb into the filling mixture until evenly distributed.
Pour the rhubarb filling over the warm pre-baked crust and spread it into an even layer.
Return the pan to the oven and bake for 30 to 35 minutes, until the filling is set in the center with just a slight jiggle and the top is lightly golden.
Allow the bars to cool completely in the pan on a wire rack, at least 1 hour. For the cleanest cuts, refrigerate for an additional 30 minutes before slicing.
Dust generously with powdered sugar, then lift the bars out using the parchment overhang. Slice into 12 bars and serve.
Equipment
- 9x13-inch baking pan
- Parchment paper
- Pastry cutter or food processor
- Large mixing bowl
- Medium mixing bowl
- Whisk
- Rubber spatula
- Wire cooling rack
- Sharp knife
Notes
Serving and Storing Your Dream Bars
Dust the bars generously with powdered sugar right before serving for that classic, pretty finish. They are wonderful at room temperature or slightly chilled straight from the fridge.
These bars pair beautifully with:
- A dollop of freshly whipped cream
- A scoop of vanilla bean ice cream
- A simple cup of hot tea or coffee
For storage, keep them in an airtight container in the refrigerator for up to 5 days. They actually taste better on day two, which makes them one of the best make-ahead desserts in the spring and summer baking repertoire. You can also freeze them individually for up to two months, making it easy to pull out a treat whenever the craving strikes.
