Bright, tangy rhubarb meets rich, buttery coffee cake in this Sour Cream Rhubarb Coffee Cake—a seasonal delight that’s perfect for brunches, potlucks, or cozy weekends. This moist and tender cake is made even more irresistible with a golden oat crumb topping that adds the perfect crunch. The sour cream ensures a soft, plush texture, while fresh rhubarb brings a tart contrast that makes every bite pop.
Whether you’re harvesting fresh rhubarb from your garden or picking some up at the farmer’s market, this simple but impressive cake is one you’ll make again and again.
Why You’ll Love This Sour Cream Rhubarb Coffee Cake
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Ultra-Moist Texture – Thanks to sour cream, every slice stays soft and tender.
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Perfectly Balanced Flavors – Sweet, tangy, and warmly spiced.
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Crumb Topping Heaven – A toasty, buttery layer of oats and cinnamon.
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Easy to Make – Simple, everyday ingredients with bakery-quality results.
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Versatile for Any Time of Day – Delicious for breakfast, dessert, or an afternoon treat.
Ingredients
For the Cake:
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2 cups all-purpose flour
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1 ½ teaspoons baking powder
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½ teaspoon baking soda
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¼ teaspoon salt
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½ cup unsalted butter, softened
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1 cup granulated sugar
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2 large eggs
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1 teaspoon vanilla extract
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1 cup sour cream
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2 cups fresh rhubarb, chopped
For the Crumb Topping:
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½ cup all-purpose flour
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½ cup old-fashioned rolled oats
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⅓ cup packed brown sugar
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½ teaspoon ground cinnamon
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¼ cup unsalted butter, cold and cubed
Instructions
1. Preheat & Prepare the Pan
Preheat oven to 350°F (175°C). Grease a 9×13-inch baking pan or line it with parchment paper for easy removal.
2. Make the Cake Batter
In a bowl, whisk together flour, baking powder, baking soda, and salt.
In a separate large mixing bowl, cream the softened butter and sugar until light and fluffy. Beat in eggs one at a time, then add vanilla.
Add the dry ingredients to the wet, alternating with sour cream, and mix just until combined. Fold in chopped rhubarb.
3. Make the Crumb Topping
In a small bowl, combine flour, oats, brown sugar, and cinnamon. Cut in cold butter using a fork or pastry cutter until the mixture resembles coarse crumbs.
4. Assemble
Spread the batter evenly in the prepared pan. Sprinkle the crumb topping evenly over the batter.
5. Bake
Bake for 40–45 minutes or until a toothpick inserted in the center comes out clean. Cool in the pan on a wire rack for at least 20 minutes before serving.
Storage & Freezing Instructions
Storage:
Keep leftovers covered at room temperature for up to 2 days, or refrigerate for up to 5 days.
Freezing:
Let the cake cool completely. Wrap slices or the whole cake in plastic wrap and foil. Freeze for up to 3 months. Thaw overnight in the fridge or at room temperature for a few hours.
Serving Suggestions & Pairings
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Warm with a cup of coffee or tea for a relaxing morning or afternoon.
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With whipped cream or vanilla ice cream for dessert.
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Next to fresh berries like strawberries or blueberries to complement the rhubarb.
Pro Tips for Perfect Coffee Cake
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Don’t Overmix – Mix until just combined to keep the cake fluffy.
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Use Fresh Rhubarb – It brings the best tart bite and vibrant color.
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Cut Butter Cold – For a crumb topping that’s crisp and not greasy.
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Test for Doneness – A clean toothpick ensures it’s fully baked.
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Let it Cool Slightly – So the crumb topping firms up without falling apart.
Conclusion
This Sour Cream Rhubarb Coffee Cake is the kind of cozy, comforting recipe that brings smiles to any table. With a soft crumb, just the right tang from the rhubarb, and a golden oat topping, it’s the perfect balance of rustic and refined. Whether you’re new to baking or a seasoned pro, this cake is sure to become a seasonal staple.
Give it a try and watch it disappear slice by slice. It’s that good.
Frequently Asked Questions
Can I use frozen rhubarb?
Yes, just thaw it first and pat it dry to remove excess moisture.
Can I make this cake in advance?
Absolutely! It tastes even better the next day and can be stored in the fridge or freezer.
Can I substitute sour cream?
Greek yogurt is a great substitute if you don’t have sour cream.
How do I make it gluten-free?
Use a gluten-free 1:1 flour blend and certified gluten-free oats.
Can I add nuts or fruit?
Yes! Try folding in chopped walnuts, pecans, or even strawberries for a delicious twist.
Sour Cream Rhubarb Coffee Cake with Crumb Topping
- Total Time: 1 hour
- Yield: 12 servings 1x
- Diet: Vegetarian
Description
A tender sour cream coffee cake filled with fresh rhubarb and topped with a golden oat crumb topping. Easy to make and perfect for brunch or dessert.
Ingredients
For the Cake:
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2 cups all-purpose flour
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1 ½ teaspoons baking powder
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½ teaspoon baking soda
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¼ teaspoon salt
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½ cup unsalted butter, softened
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1 cup granulated sugar
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2 large eggs
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1 teaspoon vanilla extract
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1 cup sour cream
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2 cups fresh rhubarb, chopped
For the Crumb Topping:
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½ cup all-purpose flour
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½ cup old-fashioned rolled oats
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⅓ cup packed brown sugar
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½ teaspoon ground cinnamon
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¼ cup unsalted butter, cold and cubed
Instructions
Preheat oven to 350°F (175°C). Grease a 9×13-inch baking pan or line it with parchment paper for easy removal.
In a bowl, whisk together flour, baking powder, baking soda, and salt.
In a separate large mixing bowl, cream the softened butter and sugar until light and fluffy. Beat in eggs one at a time, then add vanilla.
Add the dry ingredients to the wet, alternating with sour cream, and mix just until combined. Fold in chopped rhubarb.
In a small bowl, combine flour, oats, brown sugar, and cinnamon. Cut in cold butter using a fork or pastry cutter until the mixture resembles coarse crumbs.
Spread the batter evenly in the prepared pan. Sprinkle the crumb topping evenly over the batter.
Bake for 40–45 minutes or until a toothpick inserted in the center comes out clean. Cool in the pan on a wire rack for at least 20 minutes before serving.
Notes
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Use fresh rhubarb for best texture.
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Don’t overmix the batter.
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Let cake cool slightly before slicing.
- Prep Time: 15 minutes
- Cook Time: 45 minutes
- Category: Cake
- Method: Baking
- Cuisine: American
Nutrition
- Serving Size: 1 slice
- Calories: 290
- Sugar: 18g
- Sodium: 150mg
- Fat: 14g
- Saturated Fat: 8g
- Unsaturated Fat: 5g
- Trans Fat: 0g
- Carbohydrates: 38g
- Fiber: 1g
- Protein: 4g
- Cholesterol: 50mg
Keywords: rhubarb coffee cake, sour cream cake, brunch cake, crumb topping