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    Home » Dessert Recipes

    Rhubarb Dump Cake with Cake Mix

    Published: May 13, 2022 · Modified: Jun 4, 2023 by Jenna · This post may contain affiliate links · 16 Comments

    Jump to Recipe·Print Recipe

    This Rhubarb Dump Cake is so easy, it literally requires no mixing and you only need 4 ingredients to make it! It's called a dump cake because there's no effort involved and all you do is dump all the ingredients in the cake pan by layers. Watch the cake turn into this wonderful sweet streusel topping.

    Finished rhubarb dump cake on a blue plate with a dollop of whipped topping.

    Do you like rhubarb recipes like I do? Make Rhubarb Healthy Orange Rhubarb Muffins with Buttermilk, Frosted Rhubarb Cookies with Cream Cheese Frosting, Strawberry Rhubarb Lemonade, or Rhubarb Fruit Leather.

    Jump to:
    • Why You Will Love This Recipe
    • Ingredients Needed
    • How to Make Rhubarb Dump Cake 
    • What to Serve with Rhubarb Dump Cake? 
    • Recipe FAQs
    • Other  Recipes To Try 
    • Rhubarb Dump Cake

    Why You Will Love This Recipe

    It’s amazing how a simple box of cake mix can easily turn into a dessert with a streusel topping with just the help of some butter. Trust me this works, and all you do is place the butter over the top of the dry cake mix.

    Rhubarb isn't the only fruit you can do this with. Add some strawberries to the rhubarb for a more sweet and tart taste.

    Is it bad to eat cake for dinner? No??? Then good, because that is what I did for supper tonight.

    Ingredients Needed

    Ingredients for Rhubarb Dump Cake.

    Chopped rhubarb - Pick it straight from the garden if you’re one of those lucky people with rhubarb. Don’t like rhubarb? Use your favorite fruit. Cherry pie filling or apple pie filling would work great. 

    Sugar - Regular granulated sugar. I do not use sugar substitutes in any of my recipes but if you know the conversions feel free to do so. 

    Yellow cake Mix - can sub sugar free cake mix if you like 

    Butter, melted - The best butter to use for baking is unsalted butter so you can control the amount of salt that goes into the recipe.  For some dump cakes online they just call for pats of butter over the dry cake mix. That also works as well if you don’t want to melt it.

    See recipe card below for a full list of ingredients and measurements.

    How to Make Rhubarb Dump Cake 

    Rhubarb and sugar in the bottom of a cake pan.

    Step 1: In a greased glass 9 x 13 pan, lay the rhubarb and sugar in the pan.

    Dry cake mix on top of the rhubarb and sugar mixture.

    Step 2: Over the rhubarb and sugar layer, sprinkle the cake mix over the top.

    Sliced butter spread evenly over the dry cake mix.

    Step 3: Slice the cold butter into tablespoon size slices and place the butter all over the dry cake mix.

    Baked rhubarb dump cake with a wooden spoon in the dish.

    Step 4: Bake at 350 for 40 - 60 minutes or until golden & crispy on top. Check the cake at 40 to see if it's done. If it's not add on an extra 20 minutes.

    What to Serve with Rhubarb Dump Cake? 

    Dollop some fresh whipped cream on top, Cool Whip, or serve it with Vanilla Bean Ice Cream Recipe

    Make a pot of coffee or some Brown Sugar Shaken Espresso to drink while eating the cake.

    Recipe FAQs

    What is dump cake made of?

    Dump cake is just a box of any store bought cake mix and some cold butter that has been layered on the top of the cake mix. You do not need to follow the back of the cake mix box for this type of recipe.

    Do I need to add rhubarb to the cake?

    No you do not need to, I've seen people use canned fruit toppings or other types of frozen fruit like strawberries.

    How to store leftovers?

    If the cake pan you have comes with a lid for the top use that or wrap the cake pan tightly in saran wrap.

    Is dump cake supposed to be gooey?

    The butter can make the cake a little gooey right as you take it out of the oven. It is best to let the cake sit out for awhile to set to prevent that from happening.

    Other  Recipes To Try 

    • Baked Cream Cheese Spaghetti Casserole
    • Turkey, Corn, and Black Bean Chili
    • Freezer Breakfast Sandwiches (Sheet Pan Eggs)
    • One Pot Lemon Garlic Shrimp Pasta



    If you tried this Rhubarb Dump Cake or any other recipe on my website, please please leave a 🌟 star rating and let me know how you go in the 📝 comments below. I love hearing from you! Follow along on Tiktok @jennarecipediaries

    Print

    Rhubarb Dump Cake


    ★★★★★

    5 from 3 reviews

    • Author: Jenna
    • Prep Time: 20min
    • Cook Time: 40 min
    • Total Time: 40 min
    • Yield: 24 1x
    Print Recipe
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    Description

    This Rhubarb Dump Cake is so easy, it literally requires no mixing! Just dump all the ingredients in the cake pan by layers and watch the cake/crisp do it's magic in the oven


    Scale

    Ingredients

    • 4-5 cups chopped rhubarb
    • ½ cup sugar
    • 1 box of yellow cake
    • 2 sticks of butter, cut into cold cubes

    Instructions

    1. In a greased glass 9 x 9 pan, lay the rhubarb and sugar in the pan.
    2. Over the rhubarb and sugar layer, sprinkle the cake mix over the top.
    3. Slice the butter into small cubes the size of tablespoon. Then place the butter evenly over the dry cake mix. 
    4. Bake at 350 for 40 - 60 minutes or until golden & crispy on top.

    Notes

    myWW points: Blue 7; Green 7;  Purple  7

    The butter can make the cake a little gooey right as you take it out of the oven. It is best to let the cake sit out for awhile to set to prevent that from happening. 

    • Category: Easy
    • Method: Bake
    • Cuisine: American

    Nutrition

    • Calories: 208
    • Sugar: 20
    • Fat: 9
    • Saturated Fat: 3
    • Unsaturated Fat: 2
    • Carbohydrates: 33
    • Fiber: 1
    • Protein: 1

    Keywords: rhubarb dump cake

    Did you make this recipe?

    Tag @recipediariesww on Instagram

    Recipe adapted from Our Fun with Five

    More Dessert Recipes

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    Reader Interactions

    Comments

    1. Dr. Olivia says

      April 29, 2023 at 3:26 pm

      I made this with a lemon cake mix, fresh rhubarb. The flavors complimented one another and turned out wonderful! Next time, I will cut the sugar by half, was a bit too sweet, but delicious!

      ★★★★★

    2. Jenna says

      July 24, 2022 at 9:57 am

      The only two I can see that would work are spice cake or white cake mix.

    3. Catherine Davis says

      July 24, 2022 at 8:50 am

      I specifically don’t like yellow cake mix, can you suggest me something else as yellow cake mix's replacement?

    4. Jenna says

      May 16, 2021 at 5:21 pm

      Glad you liked it!

    5. Joan Dubiel says

      May 16, 2021 at 2:56 pm

      the best thing i have ever had!!! 🙂

      ★★★★★

    6. Jenna says

      May 08, 2021 at 4:05 pm

      Yes that would be delicious!

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