If you’re looking for the perfect springtime dessert that’s both easy to make and delicious, look no further than this Easy Rhubarb Cake Recipe. With its sweet and slightly tart flavor, rhubarb brings a unique twist to traditional cake, making it a favorite among families and food lovers alike. Whether you’re a seasoned baker or just getting started, this rhubarb cake recipe is simple enough for anyone to make while still offering a flavor that’s rich, balanced, and deeply satisfying.
What Makes Rhubarb Cake So Special?
Rhubarb is one of those underrated ingredients that can completely transform a dish. Its natural tartness pairs beautifully with the sweetness of cake, creating a flavor profile that’s both vibrant and comforting. When baked, rhubarb softens and blends into the cake, offering pockets of tender fruitiness that are hard to resist.
This Easy Rhubarb Cake Recipe is particularly special because it doesn’t require any fancy equipment or complicated techniques. You can whip it up in less than an hour, and it stores beautifully—meaning it’s perfect for make-ahead desserts, potlucks, or even afternoon tea.
Let’s dive into how to make this heavenly cake, along with everything you need to know to make it your new favorite go-to dessert.
🌿 Ingredients for Easy Rhubarb Cake
Here’s what you’ll need for this comforting, crowd-pleasing cake:
- 1 ½ cups chopped fresh rhubarb
- 1 cup granulated sugar
- ½ cup unsalted butter, softened
- 1 large egg
- 1 teaspoon vanilla extract
- 1 ½ cups all-purpose flour
- 1 teaspoon baking soda
- ½ teaspoon salt
- 1 cup buttermilk (or 1 cup milk + 1 tbsp vinegar or lemon juice)
- ¼ cup brown sugar (for topping)
- ½ teaspoon cinnamon (for topping)

Tip: If you don’t have buttermilk on hand, just mix your milk with vinegar or lemon juice and let it sit for 5 minutes. It’s the perfect DIY swap that won’t compromise the flavor.
🧁 Step-by-Step Directions
- Preheat your oven to 350°F (175°C) and grease a 9×13-inch baking dish. This ensures even baking and easy removal of the cake later.
- In a large mixing bowl, cream together the butter and granulated sugar until light and fluffy. This step helps create a soft, tender cake.
- Beat in the egg and vanilla extract until fully incorporated.
- In a separate bowl, whisk together the flour, baking soda, and salt.
- Gradually add the dry ingredients to the creamed mixture, alternating with the buttermilk. Stir until just combined. Avoid overmixing to keep the cake soft and airy.
- Gently fold in the chopped rhubarb, distributing it evenly throughout the batter.
- Spread the batter evenly into your prepared pan. Smooth the top with a spatula.
- In a small bowl, mix together the brown sugar and cinnamon, then sprinkle the mixture evenly over the batter.
- Bake for 35–40 minutes, or until a toothpick inserted in the center comes out clean.
- Let cool slightly before serving. This cake is fantastic both warm and chilled.
Pro Tip: Pair this rhubarb cake with a scoop of vanilla ice cream or a dollop of whipped cream for an extra-indulgent experience.
🔥 Nutritional Information
- Prep Time: 15 mins
- Cook Time: 35 mins
- Total Time: 50 mins
- Serving Size: 12 slices
- Calories per Slice: Approx. 250 kcal
Why You’ll Love This Easy Rhubarb Cake Recipe
Here’s what makes this Easy Rhubarb Cake Recipe a standout dessert:
- Minimal ingredients – Most are pantry staples.
- Quick prep – Only 15 minutes of hands-on time.
- Versatile – Can be served warm or cold.
- Make-ahead friendly – Stores well in the fridge.
- Kid-approved – A sweet way to introduce little ones to rhubarb.
- Delicious balance of sweet and tart – Thanks to the brown sugar and cinnamon topping.
Whether you’re making it for a brunch, dessert table, or just a weekend treat, this cake is bound to impress.
Customization Ideas
Want to put your own twist on this rhubarb cake recipe? Here are some fun variations:
- Add strawberries: Rhubarb and strawberries are a classic combo. Add ½ cup of chopped strawberries for extra sweetness.
- Use whole wheat flour: Sub half of the all-purpose flour with whole wheat for added fiber.
- Try a crumb topping: Mix ¼ cup flour, ¼ cup sugar, and 2 tbsp butter for a crumbly top.
- Add orange zest: A teaspoon of zest brings a bright citrus flavor.
- Make it gluten-free: Substitute with a 1:1 gluten-free flour blend.
These additions not only elevate flavor but also let you tailor the cake to your taste.
Storage and Serving Tips
- Refrigerate leftovers: Store in an airtight container in the fridge for up to 5 days.
- Freeze for later: Slice and wrap individually before freezing for up to 2 months.
- Reheat before serving: A quick 10-second microwave warm-up brings back the fresh-from-the-oven magic.
This cake is perfect for picnics, family dinners, or cozy coffee breaks.
Health Benefits of Rhubarb
Not only is rhubarb tasty, but it also offers some surprising health benefits:
- Rich in fiber – Helps with digestion.
- Good source of Vitamin K – Supports bone health.
- Contains antioxidants – Helps reduce inflammation.
- Low in calories – Great for guilt-free indulgence.
So next time you enjoy this cake, know that you’re also treating your body to some wholesome goodness.
Common Mistakes to Avoid
When baking this Easy Rhubarb Cake Recipe, keep these common missteps in mind:
- Using too much rhubarb – It can make the cake soggy.
- Skipping the buttermilk – It adds essential moisture and tang.
- Overmixing the batter – This can make the cake tough.
- Not greasing the pan – A must for easy removal.
Avoiding these errors will ensure a perfect cake every time.
Frequently Asked Questions (FAQs)
Q: Can I use frozen rhubarb instead of fresh?
A: Yes! Just thaw and drain it well before adding to the batter.
Q: What can I substitute for buttermilk?
A: Mix 1 cup of milk with 1 tbsp vinegar or lemon juice and let it sit for 5 minutes.
Q: Is this cake overly tart?
A: Not at all! The brown sugar topping balances the tartness beautifully.
Q: Can I make this cake in a different pan?
A: Absolutely. An 8×8 or 9×9-inch pan works, but baking time may need adjustment.
Q: How do I know when the cake is done?
A: Insert a toothpick into the center—if it comes out clean, it’s ready!
Q: Can I double the recipe for a larger group?
A: Yes, but use a larger pan or bake in two pans to ensure even cooking.
Q: Can I make it dairy-free?
A: Use plant-based milk and a dairy-free butter substitute. It works great!
Conclusion
There you have it—a full breakdown of the Easy Rhubarb Cake Recipe that is guaranteed to satisfy your sweet tooth while being delightfully simple to prepare. From the vibrant tang of rhubarb to the warm sweetness of cinnamon and brown sugar, every bite of this cake is pure comfort. Whether you’re serving guests or treating yourself, this cake is sure to become a beloved staple in your dessert rotation.
Don’t forget to bookmark this page and share it with friends and family who love easy, homemade treats. Happy baking! 🍰
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Easy Rhubarb Cake Recipe: A Delightfully Simple Treat That Everyone Will Love
Ingredients
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– 2 cups all-purpose flour
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– 1 tsp baking soda
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– ¼ tsp salt
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– 1 cup granulated sugar
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– ½ cup unsalted butter, softened
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– 1 large egg
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– 1 cup buttermilk (or 1 cup milk + 1 tbsp vinegar, let sit 5 mins)
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– 1 tsp vanilla extract
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– 2 cups diced fresh rhubarb
Topping (Optional but Delicious):
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– ½ cup granulated sugar
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– 1 tsp cinnamon
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– 1 tbsp cold butter, cut into bits
Instructions
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Preheat oven to 350°F (175°C). Grease and flour a 9×13-inch baking dish.
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Cream butter and sugar: In a large bowl, cream together the butter and sugar until light and fluffy.
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Add egg and vanilla: Beat in the egg and vanilla until well combined.
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Combine wet and dry: In a separate bowl, whisk together flour, baking soda, and salt. Add alternately with the buttermilk to the butter mixture, beginning and ending with the flour mixture.
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Fold in rhubarb: Gently stir in the diced rhubarb until evenly distributed.
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Pour into pan: Spread the batter evenly in the prepared baking dish.
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Make topping: Combine the sugar and cinnamon. Sprinkle evenly over the batter and dot with pieces of cold butter.
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Bake: Bake for 40–45 minutes or until a toothpick inserted into the center comes out clean.
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Cool: Let the cake cool in the pan before slicing.