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Cozy Rhubarb Custard Bars Recipe Easy Homemade Buttery Shortbread Crust

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These Cozy Rhubarb Custard Bars feature a buttery shortbread crust with a smooth, slightly wobbly custard and fresh rhubarb for a comforting yet fresh dessert.

Ingredients

  • All-purpose flour, 1 ½ cups (190g)
  • Granulated sugar, ⅓ cup (65g)
  • Unsalted butter, ½ cup (113g), softened
  • Salt, ¼ teaspoon
  • Fresh rhubarb stalks, 2 cups chopped (about 200g)
  • Large eggs, 3
  • Granulated sugar, ¾ cup (150g)
  • Whole milk, 1 cup (240ml)
  • Vanilla extract, 1 teaspoon
  • All-purpose flour, 2 tablespoons (16g)
  • Lemon zest, 1 teaspoon (optional)

Instructions

  1. Preheat your oven to 350°F (175°C). Line your 9×9-inch baking pan with parchment paper, leaving some overhang to help lift the bars out later.
  2. Make the shortbread crust: In a medium bowl, cream together the softened unsalted butter and granulated sugar until light and fluffy—about 2-3 minutes using an electric mixer. Add the salt and gradually mix in the flour until just combined. The dough will be crumbly but should hold together when pressed.
  3. Press the dough firmly into the bottom of the prepared pan. Use a spatula or your fingers to create an even layer. Bake the crust for 15 minutes, until it’s lightly golden around the edges. Remove from the oven but keep the oven on.
  4. Prepare the rhubarb: While the crust bakes, chop the rhubarb into ½-inch (1.3 cm) pieces. If your rhubarb is very tart, toss it with 1-2 tablespoons sugar and let it sit for 10 minutes to mellow the flavor.
  5. Make the custard filling: In a large bowl, whisk together the eggs and granulated sugar until combined. Add the milk, vanilla extract, lemon zest (if using), and flour. Whisk gently until smooth and slightly thickened.
  6. Scatter the rhubarb evenly over the warm crust. Pour the custard mixture slowly over the rhubarb, letting it settle evenly.
  7. Bake the bars for 35-40 minutes. The edges should be set, and the center may have a slight wobble but should not be liquid. A toothpick inserted into the center should come out with just a few moist crumbs.
  8. Cool completely on a wire rack. This step is crucial. The custard firms up as it cools, making slicing easier and cleaner.
  9. Once cooled, use the parchment paper overhang to lift the bars out of the pan. Cut into squares or rectangles with a sharp knife. For extra neatness, wipe the knife between cuts.

Notes

Line the pan with parchment paper for easy removal. If custard bubbles too much, tent with foil to prevent over-browning. Cool bars completely before slicing for clean cuts. Macerate rhubarb with sugar if very tart. For dairy-free, substitute butter and milk with alternatives. Gluten-free flour can be used but expect texture changes.

Nutrition

Keywords: rhubarb custard bars, shortbread crust, rhubarb dessert, custard bars, easy dessert, homemade bars, buttery crust, rhubarb recipe

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