Sourdough Rhubarb Cake offers a delightful combination of tangy rhubarb and the unique flavor of sourdough, making it a superb choice for breakfast, snack time, or dessert. This recipe is practical and easy, requiring only simple ingredients and minimal prep time, allowing even novice bakers to create a delicious treat. The cake’s moist texture and rich flavor make it a favorite among family and friends. Enjoy this scrumptious Sourdough Rhubarb Cake any time of the day, as it pairs perfectly with a cup of coffee or tea, making every bite even more enjoyable.
Love baking? This Sourdough Rhubarb Cake is the perfect recipe to elevate your dessert game! With its tangy flavor and simple ingredients, you’ll have a delightful treat that’s easy to prepare and a guaranteed crowd-pleaser!
Why This Recipe Works
- Easy preparation
- Family-friendly
- Budget-friendly
- Quick cooking
- Meal prep friendly
- Simple ingredients
How to Make This Recipe
Ingredients
- 1/2 cup sourdough starter discard
- 1/3 cup sour milk
- 1/3 cup oil
- 1/2 tsp. vanilla extract
- 1 egg
- 1 1/4 cup flour
- 1/2 tsp. salt
- 1/2 tsp. baking soda
- 3/4 cup brown sugar, packed
- 3/4 cup diced rhubarb
- 1/4 cup chopped nuts (optional)
- 1/2 Tbsp. melted butter
- 1/2 cup sugar
- 1/2 tsp. cinnamon
Directions
- Preheat oven to 325°.
- In a large bowl, mix the wet ingredients together.
- In a smaller bowl, mix the dry ingredients together.
- Pour the dry ingredients into the wet ingredients. Stir until just combined. Do not overmix!
- Fold in rhubarb and chopped nuts, if using. (I prefer pecans).
- Spread the batter into an 8-inch or 9-inch square baking pan.
- In the same small bowl that you used for your dry ingredients, mix the topping ingredients together.
- Sprinkle the topping over the batter.
- Bake for 40 minutes, or until a toothpick inserted into the center of the cake comes out clean.
Serving Suggestions
This delectable cake can be served warm or at room temperature, making it versatile for any occasion. Enjoy slices alongside a dollop of whipped cream for a rich dessert, or pair it with plain yogurt for a lighter breakfast option. For added flavor, serve it with a scoop of vanilla ice cream or a drizzle of caramel sauce. Its delightful balance of sweetness and tanginess makes it a perfect companion for your morning coffee or afternoon tea.
If you’re hosting a brunch or gathering, consider presenting the Sourdough Rhubarb Cake with a fruit salad or a light green salad for a refreshing contrast. This cake can also be enjoyed with a side of freshly brewed herbal tea, offering a perfect ending to your meal.
Storage and Make-Ahead Tips
This Sourdough Rhubarb Cake can be refrigerated for 3–4 days, keeping its flavorful edge. If you’d like to enjoy it later, you can freeze individual slices for up to 3 months. Wrap each slice tightly in plastic wrap and place them inside an airtight container or freezer bag for optimal freshness. To reheat, simply warm the cake in the oven at 350°F for about 10-15 minutes or microwave each slice for 30 seconds.
Cooking Tips
- Ensure your sour milk is fresh for the best flavor; if you lack sour milk, you can use plain yogurt mixed with a little water.
- For a richer flavor, let the batter sit for about 30 minutes before baking to enhance the sourdough flavor.
- Experiment with different nuts like walnuts or almonds to customize the texture and flavor.
- If using frozen rhubarb, no need to thaw; just chop it before adding to the batter.
- Add lemon zest for a citrusy punch that complements the rhubarb beautifully.
- Dust the top of the cake with powdered sugar right before serving for a decorative touch.
Quick Kitchen Tips
- Use a kitchen scale for more accurate measurement of your flour.
- Line your baking pan with parchment paper for easier removal.
- Use a toothpick to gauge if the cake is fully baked by ensuring it comes out clean.
- Keep your sourdough starter active to always have discard ready for recipes like this.
Recipe Variations
- Gluten-Free: Substitute all-purpose flour with a gluten-free blend for a gluten-free version.
- Vegan: Replace the egg with a flaxseed gel (1 tbsp flaxseed meal mixed with 3 tbsp water).
- Nut-Free: Simply omit the nuts or substitute with seeds for added crunch without allergens.
- Spicy: Add a pinch of nutmeg or ginger to the batter for a warm, spiced flavor.
- High-Protein: Substitute half the flour with protein powder for a healthier twist.
- Fruit Combo: Mix in diced strawberries or blueberries for an exciting twist to the rhubarb.


FAQs
Can I use fresh rhubarb instead of frozen?
Yes, fresh rhubarb works beautifully! Just wash, chop, and fold it directly into the batter.
Is there a substitute for sour milk?
If you do not have sour milk, you can mix regular milk with a tablespoon of vinegar or lemon juice and let it sit for a few minutes to sour.
Can I add other fruits to this cake?
Absolutely! You can add other fruits like strawberries or blueberries to enhance the flavor profile of the cake.
What should I do if the cake is too crumbly?
Ensure that you measure your flour correctly, as too much flour can make the cake crumbly. Adding a bit more sour milk can also help to maintain moisture.
How can I make this recipe ahead of time?
You can prepare the batter a day in advance and store it in the refrigerator until you’re ready to bake.
Conclusion
This Sourdough Rhubarb Cake stands out for its tangy sweetness and delightful texture, making it a must-try dessert for any occasion. With its easy preparation and available ingredients, it’s perfect for both novice and experienced bakers alike. Grab your ingredients and start baking this delicious Sourdough Rhubarb Cake today; it’s sure to be a hit!


Sourdough Rhubarb Cake
Ingredients
Method
- Preheat oven to 325°F.
- In a large bowl, mix the wet ingredients together.
- In a smaller bowl, mix the dry ingredients together.
- Pour the dry ingredients into the wet ingredients and stir until just combined; do not overmix.
- Fold in rhubarb and chopped nuts, if using.
- Spread the batter into an 8-inch or 9-inch square baking pan.
- In the same small bowl, mix the topping ingredients together and sprinkle over the batter.
- Bake for 40 minutes, or until a toothpick inserted into the center comes out clean.
