Rhubarb Coffee Cake with Brown Sugar Streusel

The Rhubarb Coffee Cake You Will Want to Make Every Spring

If you have ever stood in the garden or grocery store holding a bunch of bright pink rhubarb stalks and wondered what to do with them beyond strawberry jam, this is your answer. This Rhubarb Coffee Cake is the kind of recipe that fills your kitchen with the warm scent of cinnamon and brown sugar and has everyone wandering in to ask what is in the oven.

It is tender and moist at the center, pleasantly tart from generous pockets of fresh rhubarb, and finished with a thick, crumbly brown sugar streusel that caramelizes beautifully as it bakes. Served warm with a cup of coffee or tea, it is the kind of thing that turns an ordinary weekend morning into something worth remembering.

Getting this cake right is not complicated, but a few good tools genuinely help. A reliable hand mixer makes the butter and sugar creaming step effortless, and using a quality 9x13-inch metal baking pan ensures even heat distribution so you get that perfect golden bottom crust.

Tools & Ingredients We Recommend

Mixing Bowls

Small Bowls Set

Paelluxe Paella Pan

Why This Recipe Works

The secret to a truly moist coffee cake is sour cream in the batter. It adds a subtle tang that complements the rhubarb beautifully and keeps the crumb soft for days after baking. We also use the classic alternating wet and dry ingredient method, which prevents overmixing and keeps the texture light rather than dense or chewy.

The streusel is made with cold butter worked in by hand, which creates those chunky, irregular crumbs that bake into crisp, golden clusters rather than melting flat into a sugary paste.

Chef's Tip: Do not skip chilling the streusel while you make the batter. Cold butter is the key to getting those thick, bakery-style crumb clusters on top. If the butter warms up too much, the streusel will spread and lose its texture in the oven.

Choosing and Preparing Your Rhubarb

Fresh rhubarb is ideal here. Look for stalks that are firm and brightly colored. The redder the stalk, the more vivid the color payoff inside the cake, though green rhubarb is equally tart and delicious.

• Trim the leaves completely before using. Rhubarb leaves are not edible.
• Cut the stalks into roughly half-inch pieces so they distribute evenly and soften through during baking without turning mushy.
• If using frozen rhubarb, thaw it fully and pat it very dry before folding it in.

A little tartness is a good thing here. The rhubarb is meant to contrast with the sweet streusel and the mellow, buttery crumb. Resist the urge to add extra sugar to the rhubarb itself.

Tips for the Perfect Streusel Topping

The streusel is arguably the best part, so it deserves a little extra care.

• Use cold butter straight from the fridge and work quickly with your fingertips.
• Aim for crumbs that range from pea-sized to almond-sized for the best texture contrast.
• Spread it in a generous, even layer so every slice gets good coverage.
• If the top is browning faster than the center is setting, loosely tent the pan with foil around the 35-minute mark.

Note: Dark brown sugar gives the streusel a deeper, almost toffee-like flavor. Light brown sugar is milder and equally wonderful. Either works perfectly.

Ready to bake? Here is everything you need to make this from scratch:

Rhubarb Coffee Cake with Brown Sugar Streusel

This tender, moist Rhubarb Coffee Cake is layered with tart fresh rhubarb and crowned with a buttery brown sugar streusel that bakes up irresistibly crisp and golden.

Prep:20 mins

Cook:55 mins

Total:75 mins

Yield:12 servings

Cuisine:American

Yield: 12 servingsCalories: 310Protein: 4g

Carbs: 44gFat: 13gSat. Fat: 7gFiber: 1gSugar: 26gSodium: 220mg

Ingredients

Units

USM

Scale

1x2x3x

• 2 cups all-purpose flour, spooned and leveled
• 1 tsp baking soda
• 1 tsp baking powder
• 1/2 tsp salt
• 1/2 tsp ground cinnamon
• 1/2 cups unsalted butter, softened to room temperature
• 1 cups granulated sugar
• 2 large eggs, room temperature
• 1 tsp vanilla extract, pure, not imitation
• 1 cups sour cream, full-fat recommended
• 2 cups fresh rhubarb, trimmed and cut into 0.5-inch pieces
• 3/4 cups all-purpose flour, for streusel
• 3/4 cups packed brown sugar, light or dark, for streusel
• 1 tsp ground cinnamon, for streusel
• 6 tbsp cold unsalted butter, cut into small cubes, for streusel

Instruction

1

Preheat the oven to 350 degrees F (175 degrees C). Grease a 9x13-inch baking pan with butter or nonstick spray and set aside.

2

Make the streusel: In a medium bowl, combine 0.75 cup flour, brown sugar, and 1 tsp cinnamon. Add the cold cubed butter and use your fingertips or a pastry cutter to work it in until the mixture resembles coarse, clumpy crumbs. Refrigerate while you prepare the batter.

3

In a medium bowl, whisk together the 2 cups flour, baking soda, baking powder, salt, and 0.5 tsp cinnamon. Set aside.

4

In a large bowl, beat the softened butter and granulated sugar together with an electric hand mixer on medium-high speed until pale and fluffy, about 3 minutes.

5

Add the eggs one at a time, beating well after each addition. Mix in the vanilla extract.

6

Reduce the mixer to low and alternate adding the flour mixture and the sour cream in three additions, beginning and ending with the flour. Mix just until combined and no streaks of flour remain. Do not overmix.

7

Fold in the chopped rhubarb gently with a rubber spatula.

8

Pour and spread the batter evenly into the prepared baking pan. Remove the streusel from the refrigerator and sprinkle it in an even layer over the top of the batter.

9

Bake for 50 to 58 minutes, or until a toothpick inserted in the center comes out clean or with just a few moist crumbs. If the streusel begins to brown too quickly, loosely tent the pan with foil after 35 minutes.

10

Allow the cake to cool in the pan for at least 20 minutes before slicing and serving. Enjoy warm or at room temperature.

Equipment

• 9x13-inch baking pan
• Large mixing bowl
• Medium mixing bowl
• Electric hand mixer or stand mixer
• Rubber spatula
• Pastry cutter or fork
• Whisk
• Toothpick

Notes

Store leftovers tightly covered at room temperature for up to 2 days, or refrigerate for up to 5 days. The cake actually tastes even better on day two as the flavors meld. To freeze, wrap individual slices in plastic wrap and store in a freezer-safe bag for up to 2 months. Reheat slices in a 300 degree F oven for 10 minutes or in the microwave for 20 to 30 seconds. Frozen rhubarb works in a pinch but thaw and pat it very dry first to prevent excess moisture in the batter.

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Serving and Storing Your Coffee Cake

This cake is wonderful served warm, about 20 minutes out of the oven, when the streusel is still slightly crisp and the rhubarb is jammy and fragrant. A light dusting of powdered sugar is all the finishing touch it needs, though a dollop of lightly sweetened whipped cream or a scoop of vanilla ice cream never hurts.

For storage, cover the pan tightly and keep it at room temperature for up to two days or refrigerate for up to five. Individual slices freeze beautifully for up to two months, making this an excellent make-ahead treat for brunches, bake sales, or just having something special waiting in the freezer on a slow morning.