Oh, there’s just something about old-fashioned desserts, isn’t there? They bring back such warm, fuzzy memories! And this old fashioned rhubarb cake recipe? It’s like a hug in cake form. You know, that perfect combo of sweet and tart that just makes your taste buds sing. Rhubarb was always one of those things my grandma grew in her garden, and every spring, we’d get a mountain of it! And of course, that meant rhubarb everything – pies, crumbles, and this amazing cake.
I remember one time, I tried to sneak a bite of the raw rhubarb. Whoa, that was a mistake! Talk about sour! Grandma just laughed and said, “Patience, dear! It needs a little sugar to bring out its best!” And she was right. This old fashioned rhubarb cake recipe is pure magic. It’s got that perfect balance, and it’s so easy to whip up. Seriously, even if you’re not a baker, you can totally nail this. Trust me!
Why You’ll Love This Old Fashioned Rhubarb Cake Recipe
Quick and Easy to Make
Seriously, this isn’t one of those complicated, all-day baking projects! It comes together so fast. You just mix, pour, and bake! What could be easier?
Perfectly Sweet and Tart
That’s the rhubarb magic! It’s not too sweet, not too tart – just right. It’s like a little party in your mouth, I swear!
A Crowd-Pleasing Dessert
I’ve never met anyone who doesn’t love this cake. It’s a total winner for potlucks, family gatherings, or just a simple weeknight treat. Everyone always asks for seconds!
Uses Simple, Accessible Ingredients
No fancy, hard-to-find stuff here! You probably have most of these ingredients in your pantry already. That’s what makes it so perfect for a last-minute baking craving.
Ingredients for Your Old Fashioned Rhubarb Cake Recipe
Alright, let’s gather our goodies! Here’s what you’ll need to make this dreamy old fashioned rhubarb cake recipe. Don’t worry, it’s all pretty basic stuff!
- ½ cup unsalted butter, softened (it’s gotta be soft, not melted!)
- 1 ½ cups granulated sugar (for that perfect sweetness)
- 1 large egg (just one!)
- 3 cups chopped rhubarb (fresh is best, trust me!)
- ⅓ cup chopped nuts (pecans or walnuts are my go-to!)
- 2 cups + 1 tablespoon flour (that extra tablespoon makes a difference!)
- 1 teaspoon cinnamon (for that warm, cozy flavor)
- 1 teaspoon baking soda (helps it rise nice and fluffy)
- ½ teaspoon salt (balances the sweetness)
- 1 cup buttermilk (makes it super moist!)
- ⅓ cup sugar (for the topping)
- Whipped cream, optional (but highly recommended, of course!)
How to Prepare This Old Fashioned Rhubarb Cake Recipe: Step-by-Step Instructions
Okay, so you’ve got all your ingredients prepped and ready? Awesome! Let’s get this show on the road. Follow these steps, and you’ll have a delicious old fashioned rhubarb cake recipe baking in no time. Don’t worry, I’ll walk you through it!
Getting Started: Preheat and Prep
First things first: crank up your oven to 350 degrees Fahrenheit. While it’s heating up, grab a 9 x 13-inch cake pan and give it a good spray with cooking spray. You don’t want your beautiful cake sticking! Set it aside for now.
Making the Topping
In a small bowl, mix together that ⅓ cup of sugar, 1 teaspoon of cinnamon, and ⅓ cup of chopped nuts. This is gonna be the crunchy, sweet goodness on top, so don’t skip it! Set that bowl aside too.
Creaming Butter and Sugar
Now, in a bigger bowl (or the bowl of your stand mixer – if you’re fancy!), cream together the softened butter and 1 ½ cups of granulated sugar until it’s light and fluffy. This usually takes a few minutes. You want it nice and smooth!
Adding Eggs and Buttermilk
Crack in that one large egg and blend it well into the butter mixture. Then, in a separate small bowl, combine the baking soda and buttermilk. It might fizz a little – that’s totally normal! Add the buttermilk mixture and ½ teaspoon of salt to the butter mixture. Mix it all up until it’s well combined.
Combining Dry and Wet Ingredients
Gradually add the 2 cups + 1 tablespoon of flour to the wet ingredients, mixing until just blended. Don’t overmix! A few lumps are okay. Seriously, it won’t be perfectly smooth, and that’s fine. Overmixing makes for a tough cake, and nobody wants that!
Folding in Rhubarb
Gently fold in the 3 cups of chopped rhubarb with a spatula. Make sure it’s evenly distributed throughout the batter. This is where the magic happens!

Baking the Cake
Pour the batter into your prepared cake pan and spread it out evenly. Then, sprinkle that yummy topping we made earlier all over the top of the cake. Pop it in the oven and bake for 35 to 45 minutes. A knife inserted in the middle should come out clean when it’s done. But keep an eye on it – ovens can be tricky!

Cooling and Serving
Let the cake cool completely before cutting into it. I know, it’s hard to resist, but trust me, it’s worth the wait! Serve it topped with whipped cream, if desired. And trust me, you *do* desire it! Enjoy every single bite!
Tips for the Best Old Fashioned Rhubarb Cake Recipe
Want to make sure your old fashioned rhubarb cake recipe turns out AMAZING? Of course, you do! Here are a few of my top tips for baking success. These little tricks can really take your cake to the next level!
Don’t Overmix the Batter
Seriously, this is a big one! Overmixing develops the gluten in the flour, and that makes your cake tough. You want a tender, delicate crumb, not a hockey puck! So, mix until just combined, and then stop!
Use Fresh Rhubarb
Okay, frozen rhubarb *can* work in a pinch, but fresh rhubarb is where it’s at! It has so much more flavor and it’s just… brighter. If you can get your hands on some fresh rhubarb, definitely go for it! For more information on growing and harvesting rhubarb, check out this guide to rhubarb.
Adjust Baking Time as Needed
Every oven is a little different, right? So, keep an eye on your cake while it’s baking. Start checking for doneness around 35 minutes, and if it needs a little longer, that’s totally fine. Just don’t let it burn!
Let the Cake Cool Completely
I know, I know, it’s tempting to dig in while it’s still warm. But letting the cake cool completely allows it to set properly and makes it easier to slice. Plus, the flavors deepen as it cools! Patience, my friend!
Variations on This Old Fashioned Rhubarb Cake Recipe
Okay, so you’ve mastered the basic old fashioned rhubarb cake recipe? Awesome! Now, let’s get a little crazy and try some fun variations! Here are a few ideas to jazz it up and make it your own. Don’t be afraid to experiment!
Add Different Spices
Cinnamon is classic, but why not try a pinch of nutmeg or cardamom? Ooh, or even a little bit of ground ginger! It adds such a warm, cozy vibe. Just a little goes a long way, so start small!
Use a Different Type of Nut
Pecans and walnuts are my usual suspects, but almonds or macadamia nuts would be amazing too! Just chop ’em up and toss ’em in. Toasted nuts add even more flavor, so you could toast them lightly before adding them to the topping. Yum!
Add a Glaze
Okay, so the cake is pretty perfect as is, but a simple powdered sugar glaze? Oh, it’s divine! Just whisk together some powdered sugar with a little milk (or even lemon juice for a little zing!) until it’s smooth and drizzle it over the cooled cake. So easy, so delicious!
Serving Suggestions for Old Fashioned Rhubarb Cake Recipe
So, you’ve baked this gorgeous old fashioned rhubarb cake recipe, and you’re ready to dig in! But what to serve it with? Here are a few ideas to make it extra special. These are my absolute *favorite* ways to enjoy it!
Vanilla Ice Cream
Seriously, is there anything better than a warm slice of cake with a scoop of cold vanilla ice cream melting on top? The creamy vanilla is the perfect complement to the sweet-tart rhubarb. It’s a match made in dessert heaven, I tell ya!
Fresh Berries
Toss some fresh strawberries or raspberries on the side for a burst of extra flavor and color! The bright, juicy berries pair so well with the cake. Plus, it just looks so pretty, doesn’t it?
A Dollop of Whipped Cream
Okay, this is a classic for a reason! A dollop of whipped cream adds a touch of lightness and sweetness. It’s the perfect finishing touch. And honestly, who can resist whipped cream? Not me!
Storing Your Old Fashioned Rhubarb Cake Recipe
Made this amazing old fashioned rhubarb cake recipe and, somehow, have leftovers? First of all, I’m impressed! But don’t worry, it’s easy to keep it fresh and delicious. Here’s the lowdown on storing it!
Storing Leftovers
You can totally keep this cake at room temperature for a couple of days. Just wrap it well in plastic wrap or store it in an airtight container. If you want it to last longer, pop it in the fridge! It’ll stay good for about a week, easy. I actually think it tastes even better the next day!
Reheating Instructions
While this old fashioned rhubarb cake recipe is scrumptious cold, sometimes a little warmth is nice, right? Gently warm individual slices in the microwave for like, 15-20 seconds. Careful not to overdo it! You just want it slightly warm, not nuked to death! Or, you can pop it in a toaster oven for a few minutes. Mmm, perfection!
Nutritional Information for Old Fashioned Rhubarb Cake Recipe
Okay, so you’re probably wondering about the nutritional info for this amazing old fashioned rhubarb cake recipe, right? Well, here’s the deal: I can give you a general idea, but keep in mind that it can vary *a lot* depending on the exact ingredients you use. Different brands have different nutritional values, and all that jazz.
So, while I can’t give you precise numbers, I can tell you that this cake definitely has sugar, fat, and carbs. It’s a dessert, after all! But hey, everything in moderation, right? Just enjoy every delicious bite and don’t sweat the small stuff. Life’s too short to worry about every single calorie! Just wanted to give you that little disclaimer, so you know I’m not making any promises here! Enjoy!
Enjoyed This Old Fashioned Rhubarb Cake Recipe?
So, did you fall in love with this old fashioned rhubarb cake recipe as much as I have? I really hope so! If you gave it a try, I’d *love* to hear about it! Seriously, leave a comment below and tell me how it turned out. And hey, if you’re feeling extra awesome, give it a rating! Sharing is caring, so spread the love on social media too! Let’s get everyone baking this deliciousness!

Old Fashioned Rhubarb Cake Recipe: Grandma’s Irresistible Error
- Prep Time: 15 minutes
- Cook Time: 35 minutes
- Total Time: 50 minutes
- Yield: 12 servings 1x
- Category: Dessert
- Method: Baking
- Cuisine: American
- Diet: Vegetarian
Description
Enjoy this old fashioned rhubarb cake. It’s a sweet and tart dessert perfect for any occasion.
Ingredients
- ⅓ cup sugar
- 1 teaspoon cinnamon
- ⅓ cup chopped nuts (such as pecans or walnuts)
- ½ cup unsalted butter, softened
- 1 ½ cups granulated sugar
- 1 large egg
- 1 teaspoon baking soda
- 1 cup buttermilk
- ½ teaspoon salt
- 2 cups + 1 tablespoon flour
- 3 cups chopped rhubarb
- whipped cream, optional
Instructions
- Preheat oven to 350 degrees. Spray a 9 x 13-inch cake pan with cooking spray and set aside.
- Combine sugar, cinnamon, and nuts in a small bowl. Set aside.
- Cream butter and sugar together using a mixer.
- Add the egg and blend well.
- Combine baking soda and buttermilk in a small bowl. Then add milk mixture to butter mixture, along with salt. Mix well.
- Add flour to milk/butter mixture in two batches, mixing until well blended. (It won’t be perfectly smooth.)
- Fold rhubarb into batter with a spatula.
- Spread batter in prepared pan, then sprinkle topping evenly over cake.
- Bake cake 35 to 45 minutes, or until a knife inserted in the middle comes out clean.
- Let cake cool, then serve topped with whipped cream (if desired). Enjoy!
Notes
- Whipped cream is optional, but adds a nice touch.
- Adjust baking time based on your oven.
Nutrition
- Serving Size: 1 slice
- Calories: 350
- Sugar: 30g
- Sodium: 200mg
- Fat: 15g
- Saturated Fat: 8g
- Unsaturated Fat: 5g
- Trans Fat: 0g
- Carbohydrates: 50g
- Fiber: 1g
- Protein: 4g
- Cholesterol: 50mg