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Rhubarb Dream Bars

Rhubarb dream bars with a golden shortbread crust and a creamy custard filling studded with pink rhubarb pieces. Bake until the custard is set at the edges, then chill for clean, distinct layers.
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Prep Time 20 minutes
Cook Time 50 minutes
cooling and setting 2 hours
Total Time 4 hours 50 minutes
Servings: 16 servings
Course: Dessert
Cuisine: American
Calories: 360
Ingredients Equipment Method Notes

Ingredients
  

For crust
  • 2 cup all-purpose flour
  • 0.5 cup powdered sugar
  • 1 lb butter cold and cubed
For filling
  • 4 cup fresh rhubarb diced
  • 2 cup sugar
  • 6 eggs beaten
  • 0.5 cup all-purpose flour
  • 1 tsp vanilla extract
  • 0.25 tsp salt

Equipment

  • 1 sheet pan

Method
 

Prep and bake the crust
  1. Preheat oven to 350°F and line a 9x13-inch pan with parchment paper. Make sure the parchment overhang helps you lift the bars out later.
  2. Mix all-purpose flour and powdered sugar, then cut in cold butter until crumbly. Pinch a bit between your fingers to confirm it holds together like coarse crumbs.
  3. Press the crumb mixture into the bottom of the pan. Press firmly and evenly so the crust bakes into a solid, golden layer.
  4. Bake crust for 15 minutes until lightly golden, then remove from oven. Look for set edges and a warm, biscuit-like color.
Make the rhubarb custard and bake
  1. Whisk together sugar, eggs, all-purpose flour, vanilla extract, and salt until smooth. The batter should look glossy and fully blended.
  2. Fold in diced rhubarb. Stir gently so rhubarb pieces are evenly distributed without breaking apart.
  3. Pour rhubarb mixture over the hot crust and return to the oven. Pour slowly to keep an even layer and avoid disturbing the crust.
  4. Bake for 35-40 minutes until filling is set and edges are golden. The center should jiggle slightly but not look liquid.
Cool and chill
  1. Cool completely in the pan. Let it reach room temperature so the custard firms without cracking.
  2. Refrigerate for at least 2 hours before cutting into bars. Chilling helps the layers slice cleanly with distinct rhubarb pieces visible.

Notes

For the cleanest slices, wait until the bars are fully set when chilled—if they feel soft at the edges, refrigerate a bit longer. Store covered in the refrigerator up to 4 days; for longer storage, freeze bars in an airtight container up to 2 months. For a lighter option, replace half the sugar in the filling with a 1:1 baking sugar substitute and bake as written.