Why You’ll Love This Delightful Rhubarb Pudding Cake
Hey there, baking buddies! Are you ready to dive headfirst into a dessert that’s as easy as it is unbelievably delicious? This rhubarb pudding cake is your answer. Forget fussy techniques and complicated recipes; this one’s all about simple pleasures and maximum flavor. Picture this: a tender, moist cake bursting with the tangy sweetness of rhubarb, topped with a luscious, almost custardy glaze. The texture is simply divine – a perfect balance of soft cake and juicy fruit, creating an unforgettable eating experience.
This rhubarb pudding cake is perfect for those lazy weekend afternoons when you crave something comforting and satisfying, yet don’t want to spend hours in the kitchen. The whole process is remarkably quick, meaning more time for you to enjoy the fruits (pun intended!) of your labor. It’s also incredibly versatile – easily adaptable to your taste preferences and dietary needs, as you’ll see later. This recipe is friendly to both seasoned bakers and complete beginners, guaranteeing a successful and delectable outcome every single time. Trust me, the first bite will transport you to a place of pure baking bliss! The subtle tartness of the rhubarb perfectly complements the sweetness of the cake, creating a symphony of flavors in your mouth. You’ll find yourself craving another slice (or two!) before you know it.

What You’ll Need
Let’s gather our ingredients! This recipe uses simple, readily available items, making it perfect for a spontaneous baking session.
- Fresh Rhubarb (3 cups, chopped): The star of the show! Make sure to choose rhubarb stalks that are firm and not overly fibrous. Chopping them into roughly ½-inch pieces ensures even cooking and distribution throughout the cake.
- Granulated Sugar (2 ¼ cups total): The sugar adds the necessary sweetness and helps create the delightful pudding-like consistency in the topping. We use it in the fruit base and the topping for the best results.
- Cornstarch (2 tbsp total): This is a thickening agent. It’s essential for both the fruit base and the topping to create that luscious, slightly glossy texture.
- All-purpose Flour (1 cup): Provides the structure for our wonderful cake. You can experiment with gluten-free blends for a variation.
- Baking Powder (2 tsp): Our leavening agent, giving the cake its light and airy texture.
- Salt (¼ tsp): A pinch of salt enhances the sweetness and balances the flavors. Don’t skip it!
- Milk (½ cup): Adds moisture and richness to the cake batter.
- Unsalted Butter (2 tbsp, melted): Contributes to the moistness and tender crumb of the cake. Make sure it’s fully melted before adding it to the batter.
- Vanilla Extract (1 tsp): A touch of vanilla adds warmth and depth to the overall flavor profile.
- Boiling Water (1 cup): This is the magic ingredient for creating that wonderful pudding-like topping. Make sure your water is truly boiling before pouring it over the sugar and cornstarch mixture.
Step-by-Step Instructions
Let’s get baking! Follow these simple steps and you’ll be enjoying your rhubarb pudding cake in no time.
Step 1: Preparing the Rhubarb Filling: In a medium bowl, gently combine the chopped rhubarb, ¾ cup of granulated sugar, and 1 tablespoon of cornstarch. Toss everything together until the rhubarb is evenly coated. Set aside.
Step 2: Making the Cake Batter: In a separate large bowl, whisk together the flour, ¾ cup of granulated sugar, baking powder, and salt. This ensures even distribution of the dry ingredients.
Step 3: Combining Wet Ingredients: In a smaller bowl, whisk together the milk, melted butter, and vanilla extract. Make sure the butter is fully melted to prevent lumps in the batter.
Step 4: Combining Wet and Dry Ingredients: Gradually add the wet ingredients to the dry ingredients, mixing gently until just combined. Avoid overmixing, as this can lead to a tough cake.
Step 5: Assembling the Cake: Pour the rhubarb mixture into a greased 8×8 inch baking pan. Pour the cake batter evenly over the rhubarb.
Step 6: Preparing the Topping: In a small bowl, whisk together the remaining ¾ cup of granulated sugar and 1 tablespoon of cornstarch. Slowly pour the boiling water into the sugar and cornstarch mixture, whisking constantly until smooth and slightly thickened. This creates a beautiful, glossy topping.
Step 7: Baking the Cake: Pour the hot topping evenly over the cake batter. Bake in a preheated oven at 350°F (175°C) for 40-45 minutes, or until a toothpick inserted into the center comes out clean.
Step 8: Cooling and Serving: Let the cake cool completely in the pan before slicing and serving. This allows the cake to set properly and prevents it from crumbling. Enjoy!

Tips for Success
Here are a few tips to ensure your rhubarb pudding cake turns out perfectly:
- Don’t overmix the batter. Overmixing develops the gluten in the flour, resulting in a tough cake.
- Make sure your oven is preheated to the correct temperature. An inconsistent oven temperature can affect baking time and result in an unevenly baked cake.
- Let the cake cool completely before cutting into it. This prevents the cake from crumbling and allows the flavors to meld together beautifully.
- Use fresh rhubarb for the best flavor and texture. Frozen rhubarb can also be used, but it might release more moisture, potentially impacting the cake’s texture.
Variations to Try
Feeling adventurous? Here are a few variations you can try:
- Lemon Zest: Add a tablespoon of lemon zest to the cake batter for a burst of citrusy flavor.
- Spiced Rhubarb: Add a pinch of cinnamon, nutmeg, or ginger to the rhubarb filling for a warm, comforting twist.
- Strawberry Rhubarb: Combine rhubarb with fresh or frozen strawberries for a delightful fruity medley.
Storing and Reheating
Store leftover rhubarb pudding cake in an airtight container at room temperature for up to 3 days, or in the refrigerator for up to 5 days. To freeze, wrap the cooled cake tightly in plastic wrap, then foil, and freeze for up to 3 months. To reheat, thaw overnight in the refrigerator, then warm gently in the microwave or oven until heated through.
Frequently Asked Questions
- Can I use frozen rhubarb? Yes, you can use frozen rhubarb, but make sure to thaw it completely and drain any excess liquid before using. You may also need to adjust the baking time slightly, as frozen rhubarb tends to release more moisture.
- Can I make this cake in a different pan size? While an 8×8 inch pan is recommended, you can adjust the baking time and potentially the recipe slightly to accommodate different sizes. Larger pans will require longer baking times, and smaller pans may require shorter baking times. Always check for doneness with a toothpick.
- What if my topping is too runny? If your topping is too runny, it’s likely due to insufficient cornstarch or not enough boiling water. You might want to add a bit more cornstarch during the preparation process and ensure the water is truly boiling before adding it.

The Final Word
This delightful rhubarb pudding cake is a true testament to the magic of simple baking. The combination of tangy rhubarb, tender cake, and luscious topping creates a dessert that’s both satisfying and incredibly easy to make. It’s the perfect recipe for beginner bakers and experienced cooks alike, guaranteed to impress your family and friends. So, what are you waiting for? Give this recipe a try and let us know what you think in the comments below! Don’t forget to rate the recipe and share your baking adventures!

🍰 Rhubarb Pudding Cake ⭐
Ingredients
- **For the fruit base:**
- * 3 cups fresh rhubarb chopped
- * ¾ cup granulated sugar
- * 1 tbsp cornstarch
- * **For the cake batter:**
- * 1 cup all-purpose flour
- * ¾ cup granulated sugar
- * 2 tsp baking powder
- * ¼ tsp salt
- * ½ cup milk
- * 2 tbsp unsalted butter melted
- * 1 tsp vanilla extract
- * **For the topping:**
- * ¾ cup granulated sugar
- * 1 tbsp cornstarch
- * 1 cup boiling water
Instructions
- **Prepare the rhubarb filling:** In a medium bowl, combine the chopped rhubarb, ¾ cup granulated sugar, and 1 tbsp cornstarch. Toss gently to coat the rhubarb evenly. Set aside.
- **Preheat oven & prepare pan:** Preheat your oven to 350°F (175°C). Grease and flour a 9×13 inch baking pan.
- **Make the cake batter:** In a large bowl, whisk together the flour, ¾ cup granulated sugar, baking powder, and salt.
- **Combine wet ingredients:** In a separate bowl, whisk together the milk, melted butter, and vanilla extract.
- **Combine wet and dry:** Gradually add the wet ingredients to the dry ingredients, mixing until just combined. Do not overmix.
- **Assemble the cake:** Pour half of the cake batter into the prepared pan. Spread the rhubarb filling evenly over the batter. Pour the remaining cake batter over the rhubarb filling.
- **Make the topping:** In a small bowl, whisk together the ¾ cup granulated sugar and 1 tbsp cornstarch. Slowly pour in the boiling water, whisking constantly until smooth.
- **Pour topping & bake:** Pour the hot sugar mixture evenly over the cake batter.
- **Bake:** Bake for 35-40 minutes, or until a wooden skewer inserted into the center comes out clean. Let cool completely before serving.