When spring and early summer roll around, there is nothing quite like the aroma of a freshly baked dessert filling your kitchen. If you are looking for the perfect seasonal treat, this tasty rhubarb cake is exactly what you need. Balancing the natural, bright tartness of fresh rhubarb with a sweet, buttery, and tender crumb, this rhubarb cake has become a staple for family gatherings and weekend brunches. Whether you are an experienced baker or a complete novice, this simple yet elegant rhubarb cake will have everyone coming back for a second slice.
Table of Contents
Why This Recipe Works
The magic of this tasty rhubarb cake lies in its perfectly balanced flavor profile and fail-proof texture. Rhubarb on its own is notoriously tart, almost astringent. However, when folded into a rich, buttermilk-infused batter, that tartness cuts through the sweetness to create a complex and irresistible flavor. The buttermilk not only provides a subtle tang that complements the fruit but also tenderizes the gluten in the flour, ensuring your rhubarb cake is incredibly moist and soft. Furthermore, the batter is thick enough to suspend the chopped rhubarb, meaning you won’t end up with a soggy bottom layer of fruit.
Ingredients
To make the ultimate rhubarb cake, you will need a handful of everyday pantry staples along with your fresh produce. Here is what to gather:
- Fresh Rhubarb: 3 cups, diced. Look for firm, bright pink or red stalks for the best color, though green rhubarb tastes just as delicious.
- All-Purpose Flour: 2 cups, plus 1 tablespoon for tossing with the rhubarb.
- Granulated Sugar: 1.5 cups, for the perfect level of sweetness.
- Unsalted Butter: 1/2 cup (1 stick), softened to room temperature.
- Eggs: 2 large eggs, room temperature.
- Buttermilk: 1 cup. This makes the rhubarb cake exceptionally tender.
- Vanilla Extract: 2 teaspoons to enhance the overall flavor.
- Baking Powder & Baking Soda: 1 teaspoon of each to give the cake a beautiful rise.
- Salt: 1/2 teaspoon to balance the sweetness.
Equipment
You don’t need a commercial bakery setup to produce a beautiful rhubarb cake. The required equipment is quite basic:
- A 9×13 inch baking pan or a 9-inch springform pan, depending on how thick you want your cake slices.
- Two large mixing bowls (one for wet ingredients, one for dry).
- An electric hand mixer or a stand mixer fitted with a paddle attachment.
- A silicone spatula for folding the batter.
- Measuring cups and spoons.
Step by Step Guide
Follow these simple instructions to achieve a flawless, tasty rhubarb cake every single time.
Step 1: Prep the Oven and Pan
Preheat your oven to 350°F (175°C). Grease your baking pan generously with butter or non-stick baking spray, and line the bottom with a piece of parchment paper to ensure an easy release.
Step 2: Prepare the Rhubarb
Wash and dice your rhubarb into half-inch pieces. In a small bowl, toss the diced rhubarb with 1 tablespoon of flour. This crucial step prevents the rhubarb pieces from sinking to the bottom of your rhubarb cake during baking.
Step 3: Mix Dry Ingredients
In a medium bowl, whisk together the 2 cups of all-purpose flour, baking powder, baking soda, and salt. Set this aside.
Step 4: Cream Butter and Sugar
In your large mixing bowl, beat the softened butter and granulated sugar on medium-high speed for about 3-4 minutes, until the mixture is light, fluffy, and pale in color. Scrape down the sides of the bowl as needed.
Step 5: Add Eggs and Vanilla
Add the eggs one at a time, beating well after each addition. Pour in the vanilla extract and mix until just combined.
Step 6: Combine Wet and Dry
Turn your mixer to the lowest speed. Add a third of the dry flour mixture, followed by half of the buttermilk. Repeat this process, ending with the dry ingredients. Mix only until the flour disappears to avoid a dense rhubarb cake.
Step 7: Fold in the Rhubarb
Using your silicone spatula, gently fold the flour-dusted rhubarb into the batter. The batter will be quite thick; this is normal!
Step 8: Bake
Spread the batter evenly into your prepared baking pan. Bake for 45-55 minutes, or until a toothpick inserted into the center comes out clean or with a few moist crumbs. Let the rhubarb cake cool in the pan for at least 20 minutes before serving.
To Incorporate With
This tasty rhubarb cake is incredibly versatile and pairs wonderfully with a variety of accompaniments. For a classic dessert experience, serve a warm slice with a generous scoop of vanilla bean ice cream. The melting cream mingling with the tart rhubarb is heavenly. Alternatively, a dollop of freshly whipped cream infused with a touch of cinnamon makes for a lighter pairing. If you’re serving this for breakfast or brunch, it goes exceptionally well with a hot cup of black coffee or Earl Grey tea. For more dessert inspiration, internal link to our favorite dessert pairings guide.
Varieties / Substitutions
One of the best things about this rhubarb cake recipe is its adaptability. Here are a few ways to customize it:
- Strawberry Rhubarb Cake: Substitute 1 cup of the diced rhubarb with 1 cup of fresh, diced strawberries. The sweetness of the strawberries beautifully complements the tart rhubarb.
- Gluten-Free: You can easily make this a gluten-free rhubarb cake by swapping the all-purpose flour for a high-quality 1:1 gluten-free baking blend. If you want to external link to learn more about the best gluten-free flours, make sure your blend contains xanthan gum.
- Dairy-Free: Swap the butter for a plant-based butter alternative and use a dairy-free milk mixed with 1 tablespoon of lemon juice in place of the buttermilk.
- Spice it up: Add 1 teaspoon of ground cinnamon and 1/2 teaspoon of ground ginger or cardamom to the dry ingredients for a warmly spiced variation.
Tips for Success
To ensure your tasty rhubarb cake comes out perfectly, keep these expert tips in mind:
- Room Temperature Ingredients: Ensure your butter, eggs, and buttermilk are all at room temperature before you start. This allows the ingredients to emulsify properly, yielding a smoother batter and a finer crumb in your rhubarb cake.
- Do Not Overmix: Once you add the flour, mix only until no streaks remain. Overmixing develops the gluten, which can result in a tough, rubbery cake rather than a tender one.
- Tossing the Rhubarb: Never skip tossing your diced rhubarb in a bit of flour. It creates a friction barrier that stops the fruit from sinking to the bottom of the pan.
- Cooling Time: Allow the cake to cool for at least 20 minutes before slicing. Cutting it while it’s piping hot can cause the cake to crumble and fall apart.
10 FAQ
We receive lots of questions about baking the perfect rhubarb cake. Here are 10 of the most frequently asked questions and their answers:
1. Can I use frozen rhubarb for this rhubarb cake?
Yes! You can absolutely use frozen rhubarb. Do not thaw it first, as it will become too mushy and release too much water into the batter. Simply toss the frozen pieces in flour and fold them directly into the batter. You may need to add 3-5 minutes to your baking time.
2. Do I need to peel the rhubarb?
No, there is no need to peel the rhubarb. The skin softens beautifully as the rhubarb cake bakes and provides that lovely pink color.
3. How should I store the leftover cake?
Store your tasty rhubarb cake in an airtight container at room temperature for up to 2 days, or in the refrigerator for up to 5 days.
4. Can I freeze rhubarb cake?
Absolutely. Wrap individual slices or the entire cooled cake tightly in plastic wrap, then place in a freezer-safe bag. It will keep well in the freezer for up to 3 months. Thaw overnight in the refrigerator before eating.
5. Why did my cake sink in the middle?
A cake usually sinks if it is underbaked, if the oven door was opened too early during baking, or if your baking powder/baking soda is expired. Always test the center with a toothpick to ensure it is fully baked.
6. Can I bake this in a bundt pan?
This specific batter is quite dense and is best suited for a 9×13 or 9-inch round pan. Baking it in a bundt pan might require a longer baking time and could result in uneven cooking.
7. Is rhubarb toxic?
Only the leaves of the rhubarb plant are toxic because they contain high levels of oxalic acid. The stalks, which are the part used in this rhubarb cake, are perfectly safe and delicious to eat.
8. What if I don’t have buttermilk?
If you don’t have buttermilk on hand, you can make a quick substitute. Mix 1 cup of regular milk (whole milk is best) with 1 tablespoon of white vinegar or lemon juice. Let it sit for 5-10 minutes until it curdles slightly, then use it as directed.
9. How do I know when the rhubarb cake is done?
The cake is done when the edges are golden brown and pulling slightly away from the sides of the pan. Additionally, a toothpick inserted right into the center should come out clean or with just a few moist crumbs clinging to it.
10. Can I make this cake a day ahead?
Yes, this tasty rhubarb cake actually tastes phenomenal on the second day! The moisture from the rhubarb has time to evenly distribute through the crumb, making the cake incredibly tender.
Conclusion
Baking a tasty rhubarb cake is one of the greatest pleasures of the spring and summer seasons. With its perfectly tender crumb and bright, tangy fruit bursts, this dessert is guaranteed to become a household favorite. Grab some fresh stalks, preheat your oven, and enjoy the magical, comforting aroma of this classic rhubarb cake baking in your kitchen. Happy baking!