Nothing says spring quite like the vibrant flavors of a Lemon Rhubarb Sourdough Discard Cake. Each bite offers an enchanting mix of tangy rhubarb with a hint of lemon zest, creating a delightful experience that’s both moist and airy. After several kitchen trials, I discovered the perfect balance, ensuring that the sourdough discard not only elevates the cake’s texture but also adds depth to the flavor. If you’re interested in berry-inspired baking, check out my Strawberry Pound Cake.
About Lemon Rhubarb Sourdough Discard Cake
This enchanting cake highlights the unique combination of tangy rhubarb and zesty lemon. Tested multiple times, I’ve refined this recipe to make it both accessible and reliably delicious. It’s a fantastic way to use leftover sourdough discard, providing a light crumb that’s loved by family and friends. Perfect for cozy gatherings, this cake welcomes easy preparation without sacrificing flavor.
- Quick prep, making it ideal for busy days.
- Budget-friendly, as rhubarb is often easy to find and affordable.
- A family favorite that brings comfort and joy to any dessert table.
- This cake is a lovely nod to traditional American recipes that feature seasonal ingredients.
Key Ingredients & Their Roles
- Rhubarb: Provides a tartness that enhances sweetness; consider substituting with strawberries or apples if rhubarb is unavailable.
- All-Purpose Flour: Keeps the cake soft; can swap with a gluten-free blend if needed.
- Sourdough Discard: Adds moisture and a slight tang; make sure it’s at room temperature for best results.
- Cane Sugar: Sweetens and helps brown the cake; brown sugar can add a delicious caramel note.
How to Make Lemon Rhubarb Sourdough Discard Cake
- Start by preheating your oven to 350°F. Grease and line an 8-inch or 9-inch square cake pan (both work beautifully, but the 8-inch size will yield a thicker cake).
- Chop the rhubarb into small pieces and place them in a medium bowl, ready to shine in every slice.
- In a separate bowl, whisk together the flour, baking powder, and salt. Take two heaping teaspoons from this mix and add it to the rhubarb. This trick helps prevent the rhubarb from sinking in the batter.
- In a stand mixer, blend 145 grams of sugar with oil and lemon zest on medium speed for a minute until the sugar begins to dissolve, then add the eggs and mix until frothy.
- Combine honey, sourdough discard, vanilla extract, lemon juice, and milk, and mix until just combined. Gradually add the dry ingredients, mixing on low speed until no flour bits remain.
- Gently fold in the rhubarb, ensuring it’s evenly distributed. Pour into the cake pan, smoothing the top, and adorn with longer pieces of rhubarb for visual appeal. Top with the remaining sugar.
- Bake for 25 minutes (8-inch) or 20 minutes (9-inch) at 350°F, then reduce the temperature to 330°F, baking until a toothpick comes out with a few moist crumbs – don’t let it overbake!
Pro Tips & Troubleshooting
- When creaming the sugar and oil, an effective technique is to let it mix until it appears slightly fluffy—this adds air and helps the cake rise.
- A common mistake is overmixing the batter after adding the flour; just mix until no flour traces remain to keep it tender.
- Consider seasonal variations—try swapping rhubarb for fresh strawberries or even peaches for a different flavor profile.
- Scaling the recipe is easy: simply double the ingredients for a larger gathering or halve them for a smaller treat.
Storage & Make-Ahead Guide
This cake keeps well in the refrigerator for up to 4 days. It can also be frozen for 2 months. Reheat in the oven at 350°F for about 10 minutes, or microwave for 30 seconds for individual slices. After testing storage, I found that it remains just as moist when sealed properly, which is a wonderful bonus!
Serving Suggestions
Serve your Lemon Rhubarb Sourdough Discard Cake with a dollop of whipped cream or a side of fresh fruit. For a light meal, pair it with a refreshing salad, such as a mixed arugula salad that complements the cake’s tanginess. Check out my Dill Pickle Bread for a unique side!
Frequently Asked Questions
- Can I use frozen rhubarb? Yes, just thaw and drain excess moisture before using.
- What other fruits work well in this cake? Strawberries, peaches, or apricots can be delightful alternatives.
- How do I know when the cake is done baking? A toothpick should come out with a few moist crumbs, not wet batter.
- Can I reduce the sugar? You may reduce it, but it might affect the moisture level.
- Can I make the batter ahead of time? It’s best to bake immediately after mixing for optimal results.
Final Thoughts
I genuinely love this Lemon Rhubarb Sourdough Discard Cake, especially when paired with a hot cup of tea. It’s a nostalgic treat that brightens up any afternoon. I encourage you to try it and share your experiences; I can’t wait to hear how it turns out for you!
More Recipes You’ll Love
- Strawberry Cobbler – the fruitiness pairs well with rhubarb
- Moist Strawberry Cake – similar baking technique with a delightful twist
- Strawberry Pound Cake – delicious berry flavor that complements a tangy cake
Lemon Rhubarb Sourdough Discard Cake
Ingredients
- 8 ounces fresh rhubarb
- 170 grams all-purpose flour
- 1.5 teaspoons baking powder
- 0.5 teaspoon fine salt
- 155 grams cane sugar
- 0.5 cup sunflower or grapeseed oil
- 2 teaspoons lemon zest
- 2 eggs room temperature
- 2.5 tablespoons runny honey
- 65 grams sourdough discard preferably room temperature
- 1.5 teaspoons vanilla extract
- 1 tablespoon fresh lemon juice
- 2.5 tablespoons whole milk
Instructions
- Preheat oven to 350 degrees F. Grease and line a square 8-inch or 9-inch cake pan.
- Add chopped rhubarb to a medium bowl.
- In another medium bowl, whisk together flour, baking powder, and salt. Scoop 2 heaping teaspoons from this mixture and add it to bowl with chopped rhubarb. Toss to combine.
- In a stand mixer or with a hand mixer, on medium speed beat cane sugar with the oil and lemon zest for 1 minute. Then add eggs, and beat for 30 seconds on medium speed.
- Add honey, sourdough discard, vanilla extract, lemon juice, and milk, and mix on medium speed until just combined.
- Gently fold in the rhubarb. Place batter into the greased cake pan, and smooth the top. Add longer pieces of rhubarb to the top, in any pattern you’d like.
- Bake for 25 minutes at 350 degrees F, then turn oven down to 330 degrees F and bake for about 15 minutes more until a toothpick comes out with a few moist crumbs.
- Remove from oven and let cool on a cooling rack.