Rhubarb Coffee Cake Moist & Buttery Crumb is a heavenly weekend bake that transforms vibrant, tangy rhubarb into sweet pockets of joy beneath a rich, golden streusel. A tender coffee cake studded with vibrant rhubarb chunks and crowned with a rich, buttery crumb topping, it marries soft, moist cake layers with cinnamon-kissed streusel for an unforgettable breakfast or dessert experience that's sure to become your new favorite.
Key Ingredients
Get ready to gather the essentials that make this cake shine—tart rhubarb, a creamy sour cream base, and a buttery streusel for that perfect crumb.
- 2 cups chopped rhubarb: Provides bright, tangy flavor and juicy freshness in every bite.
- 2 cups all purpose flour: Creates the structure for the tender cake crumb.
- 1 teaspoon baking powder: Helps the cake rise for a light, airy texture.
- 1 teaspoon baking soda: Works with the sour cream to leaven and lighten the crumb.
- 1/2 teaspoon salt: Balances sweetness and enhances overall flavor.
- 1 cup granulated sugar: Sweetens the batter for a perfectly balanced cake.
- 1 large egg: Binds ingredients and adds richness to the crumb.
- 1 cup sour cream: Keeps the cake moist with a subtle tang.
- 1/2 cup unsalted butter, melted: Adds buttery richness and tenderizes the crumb.
- 1 teaspoon vanilla extract: Infuses warm, aromatic flavor.
- 1 cup all purpose flour: Forms the base of the buttery crumb topping.
- 1/2 cup packed brown sugar: Sweetens and brings caramel notes to the streusel.
- 1 teaspoon ground cinnamon: Adds a warm, spicy kick to the crumb.
- 1/4 teaspoon salt: Enhances the sweetness in the streusel topping.
- 1/2 cup unsalted butter, cold and cubed: Creates flaky crumbs when cut into the topping.
How To Make Rhubarb Coffee Cake Moist & Buttery Crumb
Let’s walk through how to transform simple pantry staples into a showstopping cake. You’ll start by mixing a tangy sour cream batter, folding in juicy rhubarb, then crafting a crumbly streusel that bakes into a golden crown of buttery goodness. Each step builds on the last to deliver a moist, tender crumb under a crisp, cinnamon-spiced topping.
1. Preheat the oven to 350°F (175°C) and generously grease a 9×13-inch baking pan with butter or nonstick spray for easy release.
2. In a large bowl, whisk together 2 cups all purpose flour, 1 teaspoon baking powder, 1 teaspoon baking soda, 1/2 teaspoon salt, and 1 cup granulated sugar until evenly combined.
3. In a separate bowl, beat the large egg, then stir in 1 cup sour cream, 1/2 cup melted unsalted butter, and 1 teaspoon vanilla extract until smooth.
4. Pour the wet ingredients into the dry mixture and stir gently until just combined—overmixing can toughen the cake.
5. Gently fold in the 2 cups chopped rhubarb to distribute tart pockets throughout the batter.
6. In another bowl, combine 1 cup all purpose flour, 1/2 cup packed brown sugar, 1 teaspoon ground cinnamon, and 1/4 teaspoon salt, then cut in the 1/2 cup cold cubed butter with a pastry cutter or fork until coarse crumbs form.
7. Spread the batter evenly into the prepared pan, smoothing the top with a spatula.
8. Sprinkle the buttery crumb topping evenly over the batter, covering the surface in golden clusters.
9. Bake for 45 to 50 minutes, or until a toothpick inserted into the center comes out clean or with a few moist crumbs attached.
10. Allow the cake to cool in the pan for at least 15 minutes before slicing to let the crumb set.
Serving Suggestions
Once your Rhubarb Coffee Cake Moist & Buttery Crumb is baked and cooled just slightly, these ideas will help you present each slice like a pro—whether it’s a cozy breakfast indulgence or a sweet finish to dinner.
- Warm with a dollop of whipped cream: The creamy topping melts into the crumb for extra richness and balances the rhubarb’s tartness.
- Dust with powdered sugar: A light sprinkle over the top adds a pretty finish and a touch of sweetness.
- Serve alongside fresh berries: Complement the rhubarb with strawberries or raspberries for vibrant color and extra fruity flavor.
- Pair with a hot cup of coffee or tea: The cake’s buttery crumb perfectly offsets the bitterness of dark roast or the subtle notes of herbal tea.
Tips For Perfect Rhubarb Coffee Cake Moist & Buttery Crumb
A few insider tricks will ensure your cake comes out every bit as dreamy as you imagine. Keep these friendly pointers in mind to nail the texture, balance the tartness, and enjoy the best slice possible.
- This coffee cake is best served warm from the oven: Enjoy right away so the crumb topping stays crisp and the cake remains tender.
- You can use fresh or frozen rhubarb without thawing: Fold frozen pieces directly into the batter, though it may bake a few minutes longer if extra moisture is released.
- Adjust sugar level to balance the tartness of the rhubarb: Add up to two tablespoons more granulated sugar in the batter or a splash of brown sugar in the streusel to suit your taste.
- Store leftovers in an airtight container for up to 3 days: This helps preserve moisture and keeps the crumb topping from softening too quickly.
How To Store It
Keeping your cake fresh is a breeze when you follow a few simple steps. Whether you share every slice or savor it over a few mornings, these storage methods will maintain its buttery flavor and tender crumb.
- Room temperature: Once fully cooled, place slices in an airtight container and store at room temperature for up to 2 days.
- Refrigeration: For up to 3–4 days, wrap individual pieces in plastic wrap, then seal in a container to prevent drying out.
- Freezing: Freeze slices wrapped in parchment and foil for up to 1 month; thaw overnight in the fridge before reheating.
- Reheating: Warm individual slices in a 325°F oven for 5–7 minutes or microwave for 15–20 seconds to restore crispness and warmth.
Frequently Asked Questions
Here are answers to the most common questions about this irresistible coffee cake:
- Q: How long does it take to prepare this recipe?
A: It takes about 15 minutes to assemble the ingredients and mix the batter, plus another 10 minutes to prepare the crumb topping and assemble the cake in the pan. Baking requires 45 to 50 minutes, and you should allow at least 15 minutes of cooling time before slicing. In total you’re looking at roughly 1 hour and 20 minutes from start to finish.
- Q: Can I use frozen rhubarb instead of fresh?
A: Yes, you can use frozen rhubarb without thawing. Simply measure out two cups of frozen rhubarb and fold it directly into the batter. Be aware that frozen rhubarb may release extra moisture, so bake until the cake is set and a toothpick inserted in the center comes out clean, which may take a few minutes longer.
- Q: How do I know when the cake is fully baked?
A: The cake is done when the edges pull away slightly from the pan and the crumb topping turns a light golden brown. Insert a toothpick into the center of the cake; it should come out clean or with just a few moist crumbs attached. If the cake still looks wet in the middle or the toothpick has batter on it, continue baking for another five minutes and check again.
- Q: What can I substitute for sour cream if I don’t have any on hand?
A: You can substitute plain Greek yogurt or a mixture of ¾ cup milk plus ¼ cup melted butter for the sour cream. Greek yogurt will maintain the tang and moisture that sour cream provides, while the milk-and-butter blend mimics the fat content. Stir the substitute into the wet ingredients just as you would sour cream.
- Q: How should I store and reheat leftovers?
A: Store any leftover coffee cake in an airtight container at room temperature for up to three days. To reheat, place individual slices on a microwave-safe plate and heat for 10–15 seconds or warm slices in a 325°F oven for about 5–7 minutes until heated through and slightly crisp on top.
- Q: My crumb topping turned out too wet or too dry. How can I fix it?
A: If the crumb mixture feels too wet and soggy, chill it in the refrigerator for 10 minutes before sprinkling over the batter so the butter firms up slightly. If it’s too dry and powdery, add one teaspoon of cold water or milk and gently toss until you achieve coarse clumps that hold together when pressed.
- Q: How can I adjust the sweetness to balance the rhubarb’s tartness?
A: To balance tart rhubarb, you can increase the granulated sugar in the batter by up to two tablespoons, or add an extra one to two tablespoons of brown sugar to the crumb topping. Taste the combined batter and topping before baking to ensure it’s as sweet as you prefer.
What Makes This Special
This Rhubarb Coffee Cake Moist & Buttery Crumb strikes the perfect balance between tangy fruit pockets, a luscious sour cream crumb, and a streusel that crackles under your fork—quite possibly the most fun your breakfast can have! Its intermediate level keeps you engaged without any fuss, and the vibrant pink rhubarb adds a cheerful splash of color. Feel free to print and save this recipe for any occasion, then drop a comment below if you’ve got questions, feedback, or just want to share how it turned out in your kitchen!
Rhubarb Coffee Cake Moist & Buttery Crumb
Description
Soft, moist cake layers cradle juicy rhubarb pockets beneath a golden, buttery crumb topping. Tangy fruit and cinnamon-kissed streusel blend with creamy sour cream batter for a tender, flavorful bite.
Ingredients
Instructions
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Preheat the oven to 350°F and grease a 9x13 inch baking pan.
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In a large bowl whisk together flour baking powder baking soda salt and granulated sugar.
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In a separate bowl beat the egg then stir in sour cream melted butter and vanilla extract.
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Pour the wet ingredients into the dry ingredients and stir until just combined.
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Gently fold in the chopped rhubarb.
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In another bowl combine flour brown sugar cinnamon and salt then cut in the cold cubed butter until coarse crumbs form.
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Spread the batter evenly into the prepared pan.
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Sprinkle the buttery crumb topping evenly over the batter.
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Bake for 45 to 50 minutes or until a toothpick inserted in the center comes out clean.
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Allow the cake to cool in the pan for at least 15 minutes before slicing.
Note
- This coffee cake is best served warm from the oven
- You can use fresh or frozen rhubarb without thawing
- Adjust sugar level to balance the tartness of the rhubarb
- Store leftovers in an airtight container for up to 3 days
