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Rhubarb Custard Bars Recipe

These rhubarb custard bars feature a buttery shortbread crust, a tangy-sweet rhubarb custard center, and a luscious whipped cream cheese topping. Each bite delivers a creamy, tart, and slightly crisp contrast—perfect for spring gatherings or anytime you crave a vibrant, old-fashioned dessert with a refreshing twist.
Prep Time 20 minutes
Cook Time 55 minutes
Additional Time 30 minutes
Total Time 1 hour 45 minutes
Course Dessert
Cuisine American
Servings 30 people
Calories 251 kcal

Equipment

  • Mixing bowls
  • Whisk
  • Pastry cutter or forks
  • Measuring cups and spoons
  • 9x13-inch baking dish
  • Oven
  • Electric mixer or hand mixer
  • Rubber spatula

Ingredients
  

  • 1 cup cold butter cut into cubes
  • 5 cups finely chopped rhubarb
  • 1 container frozen whipped topping such as Cool Whip, thawed
  • 2 cups all-purpose flour
  • 1 tsp vanilla extract
  • 1 package cream cheese softened
  • 2 ¾ cups white sugar divided
  • 1 cup heavy whipping cream
  • 3 eggs
  • 7 tbsp all-purpose flour

Instructions
 

  • Preheat oven to 350°F (175°C).
  • In a mixing bowl, combine 2 cups flour and 1/4 cup sugar.
  • Cut in butter using a pastry cutter or forks until the mixture resembles coarse crumbs.
  • Press mixture into a 9x13-inch baking dish to form the crust.
  • Bake the crust for about 10 minutes, or until lightly browned.
  • In another bowl, stir together 2 cups sugar and 7 tablespoons flour.
  • Whisk in heavy whipping cream and eggs until the mixture is smooth.
  • Evenly spread chopped rhubarb over the warm crust.
  • Pour the egg mixture over the rhubarb layer.
  • Bake again for about 45 minutes, or until the custard is set ander it cool.
  • In a separate bowl, beat together cream cheese, remaining 1/2 cup sugar, and vanilla extract until smooth and creamy.
  • Fold in the whipped topping gently until combined.
  • Spread the cream cheese mixture over the cooled rhubarb custard layer.
  • Refrigerate until chilled and ready to serve.

Notes

  • Fresh rhubarb works best, but frozen rhubarb can be used if it's well-drained to avoid watering down the custard.
  • For cleaner cuts, use a hot, clean knife and wipe it between slices.
  • Make sure the custard layer is fully set in the center before removing from the oven; it should jiggle slightly but not slosh.