Sour Cream Rhubarb Coffee Cake

The aroma of freshly baked coffee cake wafts through the kitchen, mingling with the tart scent of rhubarb and the sweet hint of cinnamon. This Sour Cream Rhubarb Coffee Cake is a delightful treat that comes together in about an hour. Its moist texture comes from the sour cream, creating a cake that’s perfect for brunch or a cozy afternoon snack.

This recipe is ideal for bakers of any skill level who want to impress family and friends. It’s perfect for gatherings, morning coffee, or even a simple dessert after dinner. You can prepare it ahead of time, and it stores well, making it a convenient option for busy days.

Why You’ll Love This Recipe

• The cake’s tender crumb creates a satisfying bite.
• Fresh, juicy rhubarb provides a delightful tartness.
• A crunchy topping adds texture and flavor contrast.
• It’s easy to make, requiring simple ingredients and techniques.

What You’ll Need

Gather these ingredients to bake your coffee cake.

For the Cake

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

For the Topping

• 1/2 cup packed brown sugar
• 1 teaspoon ground cinnamon
• 1/4 cup chopped walnuts or pecans (optional)

Use Greek yogurt as a substitute for sour cream.

Substitutions & Swaps

• Use coconut oil instead of butter.
• Substitute brown sugar with coconut sugar.
• Replace rhubarb with diced strawberries or apples.
• Omit nuts for a nut-free version.

How to Make It

Follow these simple steps to create your coffee cake.

Preheat the Oven

Preheat oven to 350°F (175°C) and grease a 9-inch square baking pan.

Mix Sour Cream and Baking Soda

In a small bowl, combine sour cream and baking soda; set aside to fizz and thicken slightly.

Cream Butter and Sugar

In a large bowl, cream softened butter and granulated sugar until light and fluffy.

Add Egg and Vanilla

Beat in egg and vanilla extract until well combined.

Combine Mixtures

Add the sour cream mixture to the butter mixture and mix well.

Fold in Dry Ingredients

Gradually fold in flour and salt until just combined; avoid overmixing.

Incorporate Rhubarb

Gently fold in diced fresh rhubarb.

Transfer Batter to Pan

Pour batter into the prepared pan and spread evenly.

Prepare Topping

In a separate bowl, mix brown sugar, cinnamon, and chopped nuts (if using); sprinkle evenly over batter.

Bake the Cake

Bake for 45–50 minutes, or until a toothpick inserted in the center comes out clean.

Cool Before Serving

Allow cake to cool in the pan before slicing and serving.

How to Store It

Fridge: Store in an airtight container for up to 5 days.
Freezer: Yes, wrap tightly for up to 3 months.
Reheat: Microwave for 15-20 seconds or until warm.

Tips for Best Results

• Use fresh rhubarb for the best flavor.
• Don’t skip the resting time for the sour cream mixture.
• Avoid overmixing once you add flour for a fluffier cake.
• Let the cake cool completely before slicing for cleaner pieces.

Serving Suggestions

• Serve alongside a hot cup of coffee or tea.
• Enjoy it with a scoop of vanilla ice cream.
• Pair with fresh berries for a colorful dessert plate.