Lemon Buttermilk Rhubarb Bundt Cake: A Taste of Spring

My grandmother, Elsie, had a rhubarb patch that seemed to stretch on forever, a crimson and emerald sea rippling in the summer breeze. Every spring, the arrival of rhubarb meant one thing: cake. Not just any cake, but her legendary rhubarb cake, tart and sweet in perfect harmony, a memory that still warms my kitchen and my heart to this day. This Lemon Buttermilk Rhubarb Bundt Cake takes those cherished flavors and elevates them with the bright tang of lemon, creating a truly unforgettable dessert.

Recipe Overview

• Prep Time: 30 minutes
• Cook Time: 60 minutes
• Total Time: 1 hour 30 minutes
• Servings: 12
• Yield: 1 Bundt cake
• Dietary Type: Vegetarian

Ingredients

For the Cake:

• 2 ½ cups all-purpose flour, plus 2 tablespoons all-purpose flour
• 2 teaspoons baking powder
• 1 teaspoon fine sea salt
• 1 cup unsalted butter, softened
• 1 ¾ cups sugar
• 1 lemon, zest of
• 3 eggs
• ½ teaspoon lemon oil
• ¾ cup buttermilk
• 1 lb rhubarb, trimmed and very thinly sliced (3 cups or 12 oz prepped)

For the Lemon Glaze:

• 2 cups sifted powdered sugar, more if needed
• 1 lemon, juice of
• 1 tablespoon soft unsalted butter

Equipment Needed

• 10-cup Bundt pan
• Electric mixer (with beaters or paddle attachment)
• Mixing bowls
• Sifter
• Wire rack

Instructions

1. Preheat your oven to 350°F (175°C). Ensure your oven rack is in the center position for even baking.
2. Generously butter a 10-cup Bundt pan. Make sure to get into all the nooks and crannies to prevent the cake from sticking. You can also dust it with flour after buttering for extra insurance.
3. In a medium bowl, sift together 2 ½ cups all-purpose flour, 2 teaspoons baking powder, and 1 teaspoon fine sea salt. Sifting ensures a light and airy cake texture by removing any lumps and aerating the dry ingredients.
4. In a large mixing bowl, using an electric mixer with beaters or paddle attachment, cream together 1 cup softened unsalted butter, 1 ¾ cups sugar, and the zest of 1 lemon on medium-high speed for 3-5 minutes, until the mixture is light and fluffy. This step is crucial for incorporating air into the batter, which contributes to the cake’s tenderness.
5. Add the 3 eggs one at a time, making sure each egg is fully incorporated before adding the next. Scrape down the sides of the bowl after each addition to ensure everything is evenly mixed. Then, stir in ½ teaspoon lemon oil.
6. Gradually stir in the flour mixture in 3 additions, alternating with the buttermilk in 2 additions, beginning and ending with the flour mixture. This method prevents the gluten in the flour from overdeveloping, which can result in a tough cake. The batter will be very thick.
7. In a separate bowl, toss the 1 lb rhubarb with the remaining 2 tablespoons all-purpose flour. This will help prevent the rhubarb from sinking to the bottom of the cake during baking.
8. Fold half of the floured rhubarb into the batter. Be gentle when folding to avoid deflating the batter.
9. Pour the batter into the prepared Bundt pan and sprinkle the remaining rhubarb evenly on top.
10. Bake for 30 minutes, then rotate the pan and cook for an additional 30 minutes, or until the top of the cake is firm and the center springs back when lightly touched. A toothpick inserted into the center should come out clean, or with just a few moist crumbs. If the top is browning too quickly, you can lightly tent the cake with foil during the last 15 minutes of baking.
11. Cool the cake in its pan on a wire rack for 30 minutes before inverting and removing the pan. Cooling the cake in the pan allows it to firm up slightly, making it easier to remove without breaking.
12. While the cake is cooling, prepare the lemon glaze: In a small bowl, whisk together 2 cups sifted powdered sugar, the juice of 1 lemon, and 1 tablespoon soft unsalted butter. The mixture should be thick; if not, whisk in another tablespoon or two of powdered sugar until you reach the desired consistency.
13. As soon as you remove the cake from the pan, spread the glaze evenly over the cake. The warmth of the cake will help the glaze to melt and spread beautifully.

Expert Tips & Tricks

• For an even more intense lemon flavor, try adding a tablespoon of lemon zest to the glaze in addition to the lemon juice.
• If you don’t have lemon oil on hand, you can substitute with 1 teaspoon of lemon extract, although the flavor will be slightly different.
• Make sure your butter and eggs are at room temperature. This will help them to emulsify properly, creating a smoother batter and a more tender cake.
• Don’t overmix the batter! Overmixing develops the gluten in the flour, which can result in a tough cake. Mix just until the ingredients are combined.
• If you find that your rhubarb is particularly tart, you can macerate it with a tablespoon or two of sugar for about 30 minutes before adding it to the batter. This will help to draw out some of the moisture and tame the tartness.

Serving & Storage Suggestions

This Lemon Buttermilk Rhubarb Bundt Cake is best served at room temperature. A dusting of powdered sugar adds a touch of elegance, or you can serve it with a dollop of whipped cream or a scoop of vanilla ice cream.

To store, cover the cake with a cake cover or plastic wrap. It will keep at room temperature for 3-4 days. For longer storage, you can refrigerate the cake for up to a week, but be aware that the texture may become slightly drier. You can also freeze the cake for up to 2-3 months. Wrap it tightly in plastic wrap and then in foil to prevent freezer burn. Thaw overnight in the refrigerator before serving.

Nutritional Information

Nutrient	Amount per Serving	% Daily Value
Calories	467 kcal	23%
Total Fat	18g	28%
Saturated Fat	11g	55%
Cholesterol	90mg	30%
Sodium	293mg	12%
Total Carbohydrate	73g	24%
Dietary Fiber	1g	5%
Sugars	50g	100%
Protein	5g	10%

Note: Nutritional information is an estimate and may vary based on specific ingredients and portion sizes.

Variations & Substitutions

• Gluten-Free: Substitute the all-purpose flour with a gluten-free all-purpose blend. Be sure to include xanthan gum for binding.
• Dairy-Free: Use a dairy-free butter substitute and almond or soy buttermilk. To make your own dairy-free buttermilk, simply add 1 tablespoon of lemon juice or white vinegar to a cup of your favorite plant-based milk and let it sit for 5-10 minutes to curdle.
• Spice it up: Add a pinch of ground ginger or cardamom to the batter for a warm, spiced twist.
• Berry Delight: Incorporate a cup of fresh or frozen berries (strawberries, raspberries, or blueberries) along with the rhubarb for a mixed fruit flavor.
• Citrus Zest: Experiment with different citrus zests, such as orange or grapefruit, for a unique aroma and flavor profile.

FAQs (Frequently Asked Questions)

Q: Can I use frozen rhubarb for this recipe?
A: Yes, you can use frozen rhubarb. Be sure to thaw it completely and drain off any excess liquid before tossing it with flour and adding it to the batter.

Q: My Bundt cake always sticks to the pan. What can I do?
A: Ensure you grease the pan very thoroughly, getting into all the crevices. Using a baking spray with flour or dusting the pan with flour after greasing can also help prevent sticking.

Q: Can I make this cake ahead of time?
A: Yes, this cake can be made a day or two in advance. Store it covered at room temperature. The glaze is best added just before serving.

Q: My glaze is too thin. How can I thicken it?
A: Gradually add more sifted powdered sugar, one tablespoon at a time, whisking until you reach the desired consistency.

Q: Can I freeze this cake?
A: Yes, you can freeze the cake. Wrap it tightly in plastic wrap and then in foil to prevent freezer burn. Thaw overnight in the refrigerator before serving. It’s best to freeze the cake without the glaze and add it after thawing.

Final Thoughts

This Lemon Buttermilk Rhubarb Bundt Cake is more than just a recipe; it’s a celebration of spring, a nod to simpler times, and a testament to the magic that happens when tart meets sweet. I encourage you to gather your ingredients, preheat your oven, and fill your kitchen with the irresistible aroma of baking rhubarb and lemon. Whether you’re a seasoned baker or a novice in the kitchen, this cake is sure to impress. Don’t hesitate to share your feedback and photos – I can’t wait to see your creations! Pair it with a cup of Earl Grey tea for the perfect afternoon treat.