Easy Rhubarb Coffee Cake Recipe

Rhubarb Coffee Cake is a soft, tender cake filled with juicy rhubarb and topped with a sweet, buttery crumb. The slightly tart rhubarb adds a fresh flavor that balances the sweetness of the cake, while the crumb topping gives every slice a deliciously cozy finish. It is moist, comforting, and full of the kind of homemade flavor that makes you want another piece.

This cake is perfect for breakfast, brunch, afternoon coffee, or a simple dessert with family and friends. It is especially lovely during rhubarb season when fresh stalks are easy to find. Serve a warm slice with coffee or tea, or add a little powdered sugar on top for an easy finishing touch.

Rhubarb Coffee Cake Ingredients

For the Cake

• 2 cups all-purpose flour
• 2 teaspoons baking powder
• ½ teaspoon baking soda
• ½ teaspoon salt
• ½ cup unsalted butter, softened
• 1 cup granulated sugar
• 2 large eggs
• 1 teaspoon vanilla extract
• 1 cup sour cream
• 2 cups fresh rhubarb, diced

For the Streusel Topping

• ½ cup all-purpose flour
• ½ cup brown sugar
• 1 teaspoon ground cinnamon
• ¼ cup cold butter, cubed

How to Make Rhubarb Coffee Cake

Step 1: Prepare the Oven and Pan

Preheat your oven to 350°F (175°C). Grease a 9-inch square baking pan or line it with parchment paper so the cake comes out easily after baking. Measure all of your ingredients before you begin to make the baking process smooth and stress-free.

Step 2: Make the Cake Batter

In a medium bowl, whisk together the flour, baking powder, baking soda, and salt. In a separate large bowl, beat the softened butter and sugar until the mixture becomes light and fluffy. Add the eggs one at a time, mixing well after each addition. Stir in the vanilla extract. Gradually mix the dry ingredients into the butter mixture, alternating with the sour cream. Continue mixing just until everything is combined. Avoid overmixing because it can make the cake dense instead of soft. Carefully fold in the diced rhubarb using a spatula so the fruit is evenly distributed throughout the batter.

Step 3: Prepare the Streusel Topping

In a small bowl, combine the flour, brown sugar, and cinnamon. Add the cold butter cubes and use a fork or pastry cutter to mix until coarse crumbs form. Sprinkle the streusel evenly over the top of the cake batter, making sure every part of the cake gets some of the delicious topping.

Step 4: Bake and Cool

Place the pan in the oven and bake for 40–50 minutes, or until a toothpick inserted into the center comes out clean. The top should be golden brown and slightly crisp. Let the cake cool in the pan for at least 20 minutes before slicing. This cooling time helps the cake set properly and makes it easier to cut into beautiful slices.

Why You’ll Love This Recipe

• Soft, moist, and buttery cake with a delicious crumb.
• Sweet and tart flavors are perfectly balanced.
• Crunchy cinnamon streusel adds irresistible texture.
• Easy to make with simple pantry ingredients.

Tips and Shortcuts

• Use fresh, crisp rhubarb for the best flavor and texture.
• Mix the batter just until combined to keep the cake soft and fluffy.
• Add chopped strawberries for a sweeter fruit combination.
• Let the cake cool for at least 20 minutes before slicing.

What to Serve with Rhubarb Coffee Cake

This rhubarb coffee cake is perfect for a cozy breakfast or afternoon break. I enjoy serving it with fresh strawberries or a dollop of whipped cream, and it pairs beautifully with coffee, chamomile tea, or a Lemonade.

Frequently Asked Questions

Can I use frozen rhubarb ?

Yes. Thaw it completely and drain any excess liquid before adding it to the batter.

Can I add strawberries ?

Absolutely! Strawberries pair perfectly with rhubarb and add natural sweetness.

Can I use whole wheat flour ?

Yes, but replace only half of the all-purpose flour for the best texture.

Why did my cake turn out dry ?

It was likely overbaked or had too much flour added.

How to Store Leftovers

Refrigerator Storage

Place the cake in an airtight container and refrigerate it for up to 5 days. Before serving, let it sit at room temperature for a few minutes or warm a slice in the microwave for 10–15 seconds to bring back its soft, freshly baked texture.

Freezer Storage

For longer storage, wrap individual slices tightly in plastic wrap, then place them in a freezer-safe bag or airtight container. Freeze for up to 3 months. Thaw overnight in the refrigerator or at room temperature, and warm slightly before serving for the best flavor and texture.

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