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Rhubarb Custard Cake served on plate with red napkin
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4.51 from 159 votes

Easy Rhubarb Custard Cake

Easy 6 Ingredient Rhubarb Custard Cake is a decadent dessert made with tart rhubarb, a sweet custard and a box mix cake for a simple and delicious recipe that anyone can tackle!
Prep Time10 minutes
Cook Time1 hour
Total Time1 hour 10 minutes
Course: Cake
Cuisine: American
Keyword: Box Mix Cake Dessert, Easy Dessert Recipe, Rhubarb Cake, Rhubarb Custard, rhubarb dessert
Servings: 15
Calories: 430kcal
Author: The Creative Bite

Equipment

Ingredients

  • 1 box yellow cake mix
  • Water eggs and vegetable oil required for cake mix
  • 4 c. chopped rhubarb
  • 1 1/4 c. granulated sugar
  • 1 1/2 c. heavy cream
  • OPTIONAL - whipped cream or Cool Whip for serving

Instructions

  • Preheat oven to 350°.
  • Prepare yellow cake mix as directed. Pour in a greased 9x13 pan.
  • Sprinkle chopped rhubarb and sugar evenly over the cake mix.
  • Pour heavy cream over everything.
  • Bake at 350° for 60-70 minutes.
  • Serve cake warm topped with whipped cream and store leftovers in the refrigerator.

Notes

Frozen rhubarb will work in this recipe as a substitute. Just be sure to thaw and pat it dry before adding it to the cake.

Nutrition

Serving: 1g | Calories: 430kcal | Carbohydrates: 76g | Protein: 4g | Fat: 13g | Saturated Fat: 7g | Polyunsaturated Fat: 4g | Cholesterol: 40mg | Sodium: 522mg | Fiber: 1g | Sugar: 48g