Hey there, my tangy-sweet soulmate! Let’s bake up this Rhubarb Cake with Butter Sauce—it’s about to whisk you away to a cozy, old-fashioned dessert dream. Picture this: a moist, tender cake studded with tart rhubarb, paired with a warm, velvety butter sauce that’s pure decadence drizzled over every slice. It’s sweet, it’s zesty, and it’s so easy you’ll be savoring it in no time. I’m totally thrilled for you to try this—it’s like a springtime hug with a buttery twist, and you’re gonna love every bite!
Why You’ll Love Rhubarb Cake with Butter Sauce
This cake isn’t just a dessert—it’s a nostalgic treat that’ll make any occasion feel warm and special. Whether you’re sharing it with family, treating yourself, or bringing it to a potluck, it’s a standout. Here’s why it’s about to become your new obsession:
Versatile: Perfect for spring brunches, summer picnics, or a cozy night in—anytime you want a unique sweet.
Budget-Friendly: Rhubarb, flour, butter—simple stuff turned into golden goodness.
Quick and Easy: Mix, bake, sauce—big flavor with little fuss.
Customizable: Tweak the tartness or sauce—make it your own rhubarb masterpiece!
Crowd-Pleasing: Kids will love the sweetness, adults will adore the tangy-buttery combo—everyone’s digging in.

Ingredients in Rhubarb Cake with Butter Sauce
Here’s the lineup that makes this cake a rhubarb revelation—basic ingredients turned into pure comfort:
Flour
All-purpose—for that tender, fluffy cake crumb.
Sugar
Granulated for the cake, extra for the sauce—sweetens the tart rhubarb.
Butter
Softened for the cake, melted for the sauce—richness in every layer.
Rhubarb
Fresh or frozen—chopped into tart, juicy bites.
Egg
Binds the cake—keeps it moist and light.
Baking Powder
Lifts it up—fluffy, not dense.
Milk
Whole or whatever—adds moisture to the batter.
Vanilla Extract
A splash—in the cake and sauce, ties it all together.
Heavy Cream
For the sauce—makes it luscious and pourable.
Salt
A pinch—in the cake, balances the sweetness.
Instructions
Let’s get this cake baking and saucing—it’s so easy, you’ll be drizzling in no time!
Preheat Your Equipment
Heat your oven to 350°F (175°C)—gets it ready for that golden bake.
Combine Ingredients
For the cake: Cream ½ cup butter with 1 ½ cups sugar until fluffy, beat in 1 egg and 1 teaspoon vanilla. Mix 2 cups flour, 1 teaspoon baking powder, and a pinch of salt in another bowl, then alternate adding that and 1 cup milk to the butter mix—fold in 3 cups chopped rhubarb last. For the sauce: In a saucepan, melt ½ cup butter, stir in 1 cup sugar, ¾ cup heavy cream, and 1 teaspoon vanilla—simmer 2-3 minutes until smooth.
Prepare Your Cooking Vessel
Grease a 9×13 baking dish—keeps the cake from sticking.
Assemble the Dish
Pour the batter into the dish—spread it even, rhubarb peeking through is perfect!
Cook to Perfection
Bake for 40-45 minutes until a toothpick comes out clean and it’s golden—rhubarb gets soft and jammy! Let it cool slightly while you reheat the sauce if needed.
Finishing Touches
Slice the warm cake and drizzle each piece with hot butter sauce—let it soak in a little for max yum!
Serve and Enjoy
Serve it up warm—perfect with a spoon and that sauce pooling around every bite!
Nutrition Facts
Servings: 12
Calories per serving: 380 (with sauce)
Preparation Time
Prep Time: 15 minutes
Cook Time: 45 minutes
Total Time: 1 hour
How to Serve Rhubarb Cake with Butter Sauce
This cake shines however you dish it—here’s how to make it extra divine:
Fresh Salads: Pair with a fruit salad—berries or citrus—for a tart-sweet contrast.
Crusty Bread: Skip it—the cake’s rich enough solo!
Creamy Accompaniments: Add a scoop of vanilla ice cream—sauce and cream together are heavenly!
Vegetable Sides: Nope, keep it sweet—this is all about rhubarb love!
As a Standalone: Serve warm in bowls with extra sauce on the side—rustic and irresistible.
I love it warm with a cup of coffee—the tangy rhubarb and butter sauce are pure cozy bliss!
Additional Tips
Here’s the scoop to make this cake even more amazing:
Prep Ahead: Chop rhubarb and mix dry stuff a day early—bake and sauce fresh!
Spice It Up: Add a pinch of cinnamon or ginger to the batter—warmth meets tartness!
Dietary Adjustments: Use gluten-free flour or plant-based butter—still rhubarb-tastic.
Storage Tips: Keep cake covered at room temp for 2 days, fridge for 5—sauce separate in the fridge!
Double the Batch: Double it in two pans—same bake time, more to share!
FAQ Section
Q1: Can I use frozen rhubarb?
A1: Yep! No thawing needed—just toss it in, works great!
Q2: Can I make this dish ahead of time?
A2: Totally! Bake up to a day ahead—reheat cake and sauce before serving.
Q3: How do I store leftovers?
A3: Cake at room temp for 2 days, fridge for 5—sauce in the fridge, reheat to drizzle!
Q4: Can I freeze this dish?
A4: Oh, yeah! Freeze cake (no sauce) for 2 months—thaw, then make fresh sauce!
Q5: What’s the best way to reheat this dish?
A5: Oven at 325°F for 10-15 minutes for cake—stove or microwave for sauce!
Q6: Can I double the recipe?
A6: For sure! Use two 9x13s—same time, more rhubarb joy.
Q7: Can I skip the sauce?
A7: You can, but it’s the star—cake’s still good solo if you must!
Q8: Why’s my cake soggy?
A8: Too much rhubarb juice—pat it dry if super wet next time!
Q9: Can I use margarine?
A9: Sure! Butter’s richer, but margarine works—sauce might be less creamy!
Q10: How do I pick good rhubarb?
A10: Look for firm, bright stalks—redder’s sweeter, green’s tarter, both yum!
Conclusion
There you have it, my friend—this Rhubarb Cake with Butter Sauce is your new dessert darling! It’s moist, it’s tangy, and that butter sauce is pure liquid gold—everything you want in a sweet treat and more. Whether you’re sharing with your crew or sneaking a slice for yourself, it’s a little taste of comfort you’ll crave again and again. So grab that rhubarb, melt that butter, and let’s bake up some magic together—you’re gonna love this one, I promise!
PrintRHUBARB CAKE WITH BUTTER SAUCE
This Rhubarb Cake is soft, moist, and filled with tangy rhubarb pieces, perfectly complemented by a rich and velvety Butter Sauce. It’s an easy, old-fashioned dessert that’s perfect for any occasion! #RhubarbCake #ButterSauce #EasyDessert
- Prep Time: 15 minutes
- Cook Time: 45 minutes
- Total Time: 1 hour
- Yield: 12 servings
- Category: Dessert
- Method: baking
- Cuisine: American
- Diet: Vegetarian
Ingredients
For the Cake:
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4 cups all-purpose flour
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2 cups granulated sugar
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4 teaspoons baking powder
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½ teaspoon salt
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4 cups diced rhubarb (fresh or frozen)
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2 cups milk
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6 tablespoons butter, melted 🧈
For the Butter Sauce:
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½ cup (1 stick) butter 🧈
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1 cup granulated sugar
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¾ cup heavy cream
Instructions
1. Preheat the Oven Preheat your oven to 350°F (175°C). Grease a 9×13-inch baking pan.
2. Prepare the Cake Batter In a large mixing bowl, whisk together flour, sugar, baking powder, and salt until well combined. Add diced rhubarb, milk, and melted butter to the dry ingredients. Stir gently until everything is just mixed (do not overmix).
3. Bake the Cake Pour the batter into the prepared baking pan. Bake for 45 minutes, or until a toothpick inserted in the center comes out clean. Remove from the oven and let the cake cool to room temperature.
4. Make the Butter Sauce In a saucepan, combine butter, sugar, and heavy cream. Heat over medium heat, stirring constantly. Once it starts to boil, let it simmer for 1 minute, then remove from heat.
5. Serve & Enjoy! Cut the cooled cake into slices. Drizzle each piece with the warm Butter Sauce. If the sauce cools down, gently reheat before serving.
Notes
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Storage: Store leftover cake in an airtight container at room temperature for up to 3 days.
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Freezing: You can freeze the cake (without sauce) for up to 3 months. Thaw and warm before serving.
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Serving Suggestion: Pair with whipped cream or vanilla ice cream for extra indulgence!
Nutrition
- Serving Size: 1 serving
- Calories: 350kcal
- Sugar: 35g
- Sodium: 180mg
- Fat: 15g
- Saturated Fat: 9g
- Unsaturated Fat: 5g
- Trans Fat: 0g
- Carbohydrates: 50g
- Fiber: 1g
- Protein: 4g
- Cholesterol: 40mg