Rhubarb Upside Down Cake

This Rhubarb Upside Down Cake is the perfect balance of sweet and tangy flavors with a buttery caramel topping and soft vanilla cake underneath. Bright pink rhubarb creates a beautiful presentation while adding a fresh, slightly tart flavor that pairs wonderfully with brown sugar and vanilla. This cozy homemade dessert is perfect for spring gatherings, brunch tables, or an easy family treat. Serve it slightly warm with whipped cream or vanilla ice cream for a dessert that looks impressive but comes together with simple pantry ingredients.

Why You’ll Love This Recipe

• Sweet and tangy flavor combination
• Beautiful caramelized rhubarb topping
• Soft, moist vanilla cake texture
• Easy dessert for spring and summer gatherings
• Great way to use fresh rhubarb
• Delicious served warm or chilled

Ingredients Needed

For the Rhubarb Topping

• 1/2 cup unsalted butter
• 3/4 cup packed brown sugar
• 3 cups rhubarb, cut into 1-inch pieces

For the Cake Batter

• 1 1/2 cups all-purpose flour
• 1 1/2 tsp baking powder
• 1/2 tsp salt
• 1/2 cup unsalted butter, softened
• 3/4 cup granulated sugar
• 2 large eggs
• 1 tsp vanilla extract
• 1/2 cup whole milk
• 1/4 cup sour cream

Step-by-Step Instructions

Step 1: Prepare the Pan

Preheat your oven to 350°F. Grease a 9-inch round cake pan.

Step 2: Make the Caramel Base

Melt the butter and stir in the brown sugar until smooth. Spread evenly into the prepared pan.

Step 3: Arrange the Rhubarb

Scatter the rhubarb pieces evenly over the brown sugar mixture.

Step 4: Mix Dry Ingredients

In a medium bowl, whisk together flour, baking powder, and salt.

Step 5: Prepare the Batter

In a large bowl, beat butter and sugar until light and fluffy. Add eggs one at a time, then mix in vanilla and sour cream.

Step 6: Combine Batter

Alternate adding the dry ingredients and milk, mixing just until combined.

Step 7: Bake the Cake

Spread batter carefully over the rhubarb layer. Bake for 40–45 minutes or until a toothpick inserted in the center comes out clean.

Step 8: Flip and Cool

Let the cake cool for 10 minutes before inverting onto a serving plate. Serve warm or at room temperature.

Tips for Success

• Use fresh rhubarb for the best texture and flavor
• Cut rhubarb into even pieces for uniform baking
• Do not overmix the batter
• Let the cake cool briefly before flipping
• Place a baking sheet under the cake pan to catch drips
• Serve slightly warm for the richest flavor

Variations & Substitutions

• Add sliced strawberries with the rhubarb
• Sprinkle cinnamon into the brown sugar topping
• Use Greek yogurt instead of sour cream
• Add chopped pecans or walnuts for crunch
• Replace vanilla extract with almond extract for a different flavor
• Use gluten-free flour blend if needed

Serving Suggestions

• Serve with whipped cream
• Pair with vanilla ice cream
• Enjoy with hot coffee or tea
• Add fresh strawberries on the side
• Dust lightly with powdered sugar before serving

Storage & Reheating

Store leftover Rhubarb Upside Down Cake covered in the refrigerator for up to 4 days. Freeze individual slices tightly wrapped for up to 2 months. Reheat in the microwave for 15–20 seconds or warm in a 300°F oven until heated through.

Frequently Asked Questions

Can I use frozen rhubarb?

Yes, thaw and drain excess liquid before using.

Is rhubarb supposed to taste tart?

Yes, rhubarb naturally has a tangy flavor that balances the sweet cake topping.

Can I make this cake ahead of time?

Yes, bake it a day ahead and store covered at room temperature or refrigerated.

Do I need to peel rhubarb?

No, rhubarb does not need peeling before baking.

Can I make this cake dairy-free?

Yes, use dairy-free butter, milk, and sour cream substitutes.

What pan works best for upside down cake?

A 9-inch round cake pan gives the best results for even baking and flipping.

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Rhubarb Upside Down Cake

This Rhubarb Upside Down Cake combines sweet caramelized rhubarb with a soft vanilla cake for the perfect balance of tangy and buttery flavors. Beautifully vibrant and easy to make, this cozy homemade dessert is ideal for spring brunches, family gatherings, or an elegant everyday treat.

Print Recipe Pin Recipe

Prep Time 20 minutes mins

Cook Time 45 minutes mins

Total Time 1 hour hr 5 minutes mins

Servings: 8 slices

Course: Dessert

Cuisine: American

Calories: 395

Ingredients Equipment Method Notes

Ingredients

  

• 1/2 cup unsalted butter
• 3/4 cup packed brown sugar
• 3 cups rhubarb, cut into 1-inch pieces
• 1 1/2 cups all-purpose flour
• 1 1/2 tsp baking powder
• 1/2 tsp salt
• 1/2 cup unsalted butter, softened
• 3/4 cup granulated sugar
• 2 large eggs
• 1 tsp vanilla extract
• 1/2 cup whole milk
• 1/4 cup sour cream

Equipment

• 9-inch round cake pan
• mixing bowls
• whisk
• electric mixer
• rubber spatula

Method

 

1. Preheat your oven to 350°F. Grease a 9-inch round cake pan.
2. Melt the butter and stir in the brown sugar until smooth. Spread evenly into the prepared pan.
3. Scatter the rhubarb pieces evenly over the brown sugar mixture.
4. In a medium bowl, whisk together flour, baking powder, and salt.
5. In a large bowl, beat butter and sugar until light and fluffy. Add eggs one at a time, then mix in vanilla and sour cream.
6. Alternate adding the dry ingredients and milk, mixing just until combined.
7. Spread batter carefully over the rhubarb layer. Bake for 40–45 minutes or until a toothpick inserted in the center comes out clean.
8. Let the cake cool for 10 minutes before inverting onto a serving plate. Serve warm or at room temperature.

Notes

Use fresh rhubarb for the best flavor and texture, and cut the pieces evenly for uniform baking. Let the cake cool for about 10 minutes before flipping to help the topping stay intact. Serve slightly warm with whipped cream or vanilla ice cream for the ultimate dessert experience.