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Rhubarb Cake with Cake Mix Recipe

The Best Rhubarb Cake Recipe—Made with Cake Mix (So Simple!)

There’s something magical about rhubarb—it has a perfect balance of tartness and sweetness, making it an excellent ingredient for cakes and desserts. If you love easy baking, this rhubarb cake with cake mix recipe is a must-try! Not only is it effortless to make, but it also turns out moist, fluffy, and absolutely delicious.

I first discovered this recipe when I was looking for a way to use up a surplus of rhubarb from my garden. I wanted something simple yet special, and using a cake mix seemed like the perfect shortcut. The result? A savory-sweet cake that became a household favorite!

So, if you’re craving a homemade rhubarb cake without all the hassle, let’s dive in!

This post may contain affiliate links at no extra cost to you. Please read our full disclosure here to find out more.

The Best Rhubarb Cake Recipe—Made with Cake Mix (So Simple!)

Why Use Cake Mix for Rhubarb Cake?

Baking from scratch is wonderful, but sometimes we need a quick and foolproof way to satisfy our cravings. A cake mix is a fantastic base for rhubarb cake because:

  • It saves time and guarantees consistent results.

  • It ensures a moist, fluffy texture.

  • It pairs beautifully with rhubarb’s sweet-tart flavor.

    • Choosing the Right Ingredients

    Ingredients:

  • 1 box yellow or vanilla cake mix

  • 4 cups fresh or frozen rhubarb, diced

  • 1 cup granulated sugar

  • 1 cup heavy cream (or whole milk)

  • 3 large eggs

  • 1/2 cup vegetable oil

  • 1 teaspoon vanilla extract

  • 1 teaspoon cinnamon (optional for extra flavor)

    • Extra Ingredients for Variations:

  • 1/2 teaspoon nutmeg (for a warm spice note)

  • 1/2 cup chopped walnuts or pecans (for crunch)

  • 1/4 cup brown sugar (for a richer caramelized effect)

    • Step-by-Step: How to Make the Best Rhubarb Cake with Cake Mix

    Step 1: Preheat & Prepare

    Preheat your oven to 350°F (175°C) and grease a 9x13-inch baking dish.

    Step 2: Mix the Cake Batter

    In a large bowl, combine the cake mix, eggs, vegetable oil, vanilla extract, and milk. Beat with a hand mixer on medium speed for 2 minutes until smooth.

    Step 3: Add the Rhubarb

    Toss the diced rhubarb with granulated sugar to balance the tartness. Fold it gently into the batter.

    Step 4: Bake the Cake

    Pour the batter into the prepared baking dish. Bake for 40-45 minutes, or until a toothpick inserted in the center comes out clean.

    Step 5: Let It Cool & Serve

    Allow the cake to cool for at least 15 minutes before slicing. Serve warm with a dollop of whipped cream or vanilla ice cream.

    Variations of Rhubarb Cake with Cake Mix

    1. Rhubarb Dump Cake

    For the easiest method, simply layer the rhubarb, sugar, dry cake mix, and melted butter in a pan—no mixing required! The result is a buttery, crumbly dump cake texture.

    2. Rhubarb Upside-Down Cake

    Layer brown sugar and butter at the bottom of the pan before adding rhubarb. Pour the batter over it and bake. Flip after cooling for a caramelized upside-down cake effect.

    3. Spiced Rhubarb Cake

    Add cinnamon, nutmeg, and chopped nuts for a warm, cozy flavor.

    Kitchen Must-Haves: My Top Amazon Recommendations

    1. Wilton Perfect Results Premium Non-Stick 9x13-Inch Baking Pan

    A high-quality baking pan is essential for even baking. This non-stick pan by Wilton ensures your cake bakes evenly and releases effortlessly.

    Get it here on Amazon

    2. KitchenAid 5-Speed Hand Mixer

    A good hand mixer makes mixing a breeze. The KitchenAid 5-speed hand mixer is powerful, lightweight, and perfect for this cake recipe.

    Buy now on Amazon

    3. OXO Good Grips Swivel Peeler

    If you're using fresh rhubarb, a sturdy peeler like the OXO Good Grips Swivel Peeler makes peeling rhubarb stalks effortless.

    Shop now on Amazon

    Tips for the Best Rhubarb Cake

  • Use fresh rhubarb when possible for the best flavor.

  • For extra moisture, add a dollop of sour cream or Greek yogurt to the batter.

  • Adjust sugar levels depending on how tart your rhubarb is.

  • Don’t overmix the batter—stir just until combined for a tender cake.

    • Serving & Pairing Suggestions

  • Warm with vanilla ice cream for a comforting dessert.

  • Dust with powdered sugar for a simple yet elegant finish.

  • Pair with coffee or tea for a cozy afternoon treat.

    • The Best Rhubarb Cake Recipe—Made with Cake Mix (So Simple!)

    Storing & Freezing Tips

  • Store: Keep leftover cake in an airtight container at room temperature for up to 3 days or in the fridge for up to a week.

  • Freeze: Wrap slices in plastic wrap and freeze for up to 3 months. Thaw at room temperature before serving.

    • Final Thoughts

    This rhubarb cake with cake mix recipe is truly one of the best and easiest cakes you’ll ever make! Whether you go for a classic moist cake, a dump cake, or an upside-down cake, you’re in for a treat. The tartness of rhubarb combined with the sweetness of the cake mix creates a perfect balance of flavors.

    Have you tried this recipe? Let me know your thoughts in the comments! And don’t forget to share this recipe with your fellow baking lovers. Happy baking!

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