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Grandma's Rhubarb Streusel Dessert is made in a standard 9-x-13 inch baking pan with fresh rhubarb.
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5 from 1 vote

Grandma's Rhubarb Streusel Dessert

Grandma's Rhubarb Streusel Dessert features fresh rhubarb and a sweet crumbly topping. Using simple ingredients, this dessert will have the rhubarb-lovers in your life asking for seconds.
Prep Time20 mins
Cook Time45 mins
Total Time1 hr 5 mins
Course: Dessert
Cuisine: American
Keyword: rhubarb streusel cake, rhubarb streusel dessert, strawberry rhubarb streusel cake
Servings: 12
Calories: 425kcal
Author: Barbara


Bottom Dough:

  • 1/2 cup butter or margarine 1 stick
  • 1/2 cup sugar
  • 2 eggs
  • 2 cups flour
  • 1/2 teaspoon salt
  • 1/2 teaspoon baking powder
  • 2 Tablespoons milk
  • 1 teaspoon vanilla


  • 3-4 cups rhubarb
  • 3 oz. box strawberry jello mix

Streusel Topping:

  • 1 1/2 cups sugar
  • 1 cup flour
  • 1/2 cup butter or margarine 1 stick


  • Preheat oven to 350 degrees F.
  • Spray a 9 x 13-inch baking dish with nonstick cooking spray.
  • With a mixer, cream 1 stick of butter and 1/2 cup sugar. Add one egg, and one egg yolk and mix until smooth. (Reserve the extra egg white for later.)
  • In a small bowl, mix together 2 cups flour, 1/2 teaspoon salt and 1/2 teaspoon baking powder. In a separate bowl, mix together 2 Tablespoons milk and 1 teaspoon vanilla.
  • Add flour mixture alternately with milk mixture to the mixer, blending just until a dough forms.
  • Press into the prepared 9 x 13-inch pan; set aside.
  • Beat the leftover egg white until white and foamy. Spread over dough.
  • Spread rhubarb that has been washed and diced over the egg white.
  • Sprinkle jello mix evenly over rhubarb.
  • Mix together remaining 1 cup flour, 1 1/2 cups sugar and 1 stick butter until crumbly. Sprinkle over rhubarb.
  • Bake for 40-45 minutes on bottom shelf until bubbly.


  • This recipe calls for one whole egg and one egg separated. This means to separate the yolk from the white. You'll need both parts, just in different layers of the rhubarb streusel cake. 
  • Use the strawberry jello mix dry. Do not prepare it first.
  • For this layered rhubarb dessert, press the bottom dough into a 9 x 13 inch baking dish and then add the chopped rhubarb. Next, you add the strawberry jello mix and then top with the crumb mixture.
  • Serve Grandma's Rhubarb Streusel Dessert warm. Add a scoop of vanilla ice cream or a dollop of whipped cream to kick it up a notch.
  • Check out our whole collection of rhubarb desserts here. They are all approved by Grandma. 


Calories: 425kcal | Carbohydrates: 65g | Protein: 5g | Fat: 16g | Saturated Fat: 10g | Cholesterol: 68mg | Sodium: 296mg | Potassium: 135mg | Fiber: 1g | Sugar: 40g | Vitamin A: 543IU | Vitamin C: 2mg | Calcium: 52mg | Iron: 2mg