A Rhubarb Custard Cake is a delightful treat that combines the tangy flavor of fresh rhubarb with a rich, creamy custard baked right into the cake. This visually stunning dessert is perfect for family gatherings, casual afternoon tea, or any special occasion. With its unique texture and balance of flavors, this cake will surely impress your guests and keep them coming back for more.
Why You’ll Love This Recipe
- Delicious Flavor: The tartness of rhubarb complements the sweet custard perfectly, creating a balanced taste that everyone will love.
- Easy to Make: With simple ingredients and straightforward instructions, this recipe is accessible even for beginner bakers.
- Versatile Dessert: Serve it warm as a comforting dessert or chilled for a refreshing summer treat; it’s delightful either way!
- Impressive Presentation: The thick custard layer in the center creates an elegant look that makes this cake a showstopper at any event.
- Family-Friendly: This cake appeals to both kids and adults alike, making it a great choice for family gatherings.
Tools and Preparation
Before you start baking your Rhubarb Custard Cake, it’s important to have the right tools on hand to ensure success. Having the right equipment can make the process smoother and more enjoyable.
Essential Tools and Equipment
- Mixing bowls
- Electric mixer or whisk
- Measuring cups and spoons
- Baking dish (preferably 9-inch round)
- Spatula
Importance of Each Tool
- Mixing bowls: A variety of sizes helps in organizing your ingredients efficiently.
- Electric mixer or whisk: Ensures that your batter is well combined and fluffy, essential for cake texture.
- Measuring cups and spoons: Accurate measurements are crucial for baking success.
- Baking dish: A good quality dish ensures even cooking and prevents sticking.
Ingredients
For the Custard Layer
- 2 tablespoons custard powder
- 55 g (1/4 cup) caster sugar (superfine sugar)
- 250 ml (1 cup) full cream milk
- 20 g (1 tablespoon) unsalted butter
- 2 teaspoons vanilla extract
For the Cake
- 200 g (2 sticks) unsalted butter, softened
- 110 g (1/2 cup) caster sugar (superfine sugar)
- 2 eggs
- 185 g (1 1/4 cup) plain flour (all-purpose flour)
- 2 teaspoons baking powder
For Topping
- 40 g (1/3 cup) custard powder
- 1-2 fresh rhubarb stalks
- 20 g (1 tablespoon) unsalted butter, melted
- 4 teaspoons granulated sugar

How to Make Rhubarb Custard Cake
Step 1: Preheat the Oven
Preheat your oven to 180°C (350°F). This step is crucial to ensure even baking.
Step 2: Prepare the Custard
- In a saucepan, combine the custard powder, caster sugar, and milk.
- Cook over medium heat until it thickens while stirring constantly.
- Remove from heat and stir in unsalted butter and vanilla extract. Set aside to cool slightly.
Step 3: Make the Cake Batter
- In a mixing bowl, cream together softened unsalted butter and caster sugar until light and fluffy.
- Beat in the eggs one at a time until well incorporated.
- Sift together plain flour and baking powder; gradually add to the mixture while mixing gently.
Step 4: Combine Layers
- Pour half of the cake batter into your greased baking dish.
- Evenly spread the prepared custard over this layer.
- Top with remaining batter, smoothing out with a spatula.
Step 5: Prepare Rhubarb Topping
- Chop fresh rhubarb into small pieces.
- In a small bowl, mix chopped rhubarb with melted butter and granulated sugar before sprinkling over the top of the cake.
Step 6: Bake
Bake in preheated oven for about 90 minutes or until golden brown on top and a skewer inserted comes out clean. Let cool before serving.
How to Serve Rhubarb Custard Cake
Rhubarb Custard Cake is a delightful dessert that can be served in various ways to enhance its flavors. Here are some creative serving suggestions to impress your guests and elevate your dessert experience.
Classic Serving
- Whipped Cream: Add a dollop of fresh whipped cream on top for a light and airy contrast to the dense cake.
- Ice Cream: Serve with vanilla or custard-flavored ice cream for a rich, creamy combination that complements the tartness of the rhubarb.
Brunch Delight
- Coffee Pairing: Enjoy a slice with your favorite coffee or tea; the cake’s sweetness balances perfectly with a robust drink.
- Fruit Salad: A side of fresh fruit salad brightens the plate and adds a refreshing touch.
Festive Presentation
- Dusting of Icing Sugar: Sprinkle icing sugar on top before serving for an elegant finish that makes the cake look even more inviting.
- Fresh Mint Garnish: Add a sprig of fresh mint on top for color and an aromatic hint that enhances the dessert’s appeal.
How to Perfect Rhubarb Custard Cake
To achieve the best flavor and texture for your Rhubarb Custard Cake, consider these helpful tips:
- Bold Butter Choice: Use softened unsalted butter for better control over salt levels in your cake.
- Bold Fresh Rhubarb: Select firm, vibrant rhubarb stalks; they should be crisp and free from blemishes for optimal flavor.
- Bold Temperature Check: Ensure all ingredients are at room temperature before mixing; this helps create a smooth batter.
- Bold Baking Time: Keep an eye on baking time; if the top browns too quickly, cover it with foil to avoid burning while ensuring even cooking.

Best Side Dishes for Rhubarb Custard Cake
Rhubarb Custard Cake can be complemented by several side dishes that enhance its taste. Here are some excellent options:
- Bold Vanilla Ice Cream: The classic choice that pairs well with any cake, providing creaminess against the tartness of rhubarb.
- Bold Fresh Berries: A mix of strawberries and blueberries adds a burst of flavor and color to your dessert plate.
- Bold Greek Yogurt: A dollop of tangy Greek yogurt offers a delightful contrast to the sweetness of the cake.
- Bold Lemon Sorbet: This refreshing option cleanses the palate between bites, enhancing the overall dessert experience.
- Bold Caramel Sauce: Drizzling warm caramel over each slice creates an indulgent treat that elevates every bite.
- Bold Almond Biscotti: Crunchy almond biscotti provides texture and nutty flavors that beautifully complement rhubarb custard.
Common Mistakes to Avoid
Baking a Rhubarb Custard Cake can be delightful, but some common mistakes can affect the outcome. Here are key points to consider for perfecting your cake.
- Overmixing the Batter: Mixing too much can lead to a dense cake. Stir until just combined for a lighter texture.
- Incorrect Oven Temperature: Baking at the wrong temperature can cause uneven cooking. Always preheat your oven and use an oven thermometer if needed.
- Not Preparing the Rhubarb: Failing to chop or prepare rhubarb may result in tough pieces in your cake. Cut it into small, even pieces and consider sprinkling sugar over it to soften.
- Ignoring the Rest Time: Cutting the cake too soon can ruin its structure. Allow it to cool for at least 15 minutes before slicing.
- Using Cold Ingredients: Cold butter and eggs can prevent proper mixing. Let them sit at room temperature before starting your recipe.
Storage & Reheating Instructions
Refrigerator Storage
- Store the Rhubarb Custard Cake in an airtight container.
- It can be kept in the refrigerator for up to 3 days.
- Ensure it is completely cooled before placing it in the fridge to avoid condensation.
Freezing Rhubarb Custard Cake
- Wrap slices of cake tightly in plastic wrap, then place them in a freezer-safe container.
- The cake can be frozen for up to 3 months.
- Thaw overnight in the refrigerator before enjoying.
Reheating Rhubarb Custard Cake
- Oven: Preheat the oven to 180°C (350°F) and reheat for about 10-15 minutes until warmed through.
- Microwave: Heat individual slices on medium power for about 30 seconds, checking frequently.
- Stovetop: Place a slice in a pan over low heat, covering with a lid, and heat until warm, about 5 minutes.

Frequently Asked Questions
What is Rhubarb Custard Cake?
Rhubarb Custard Cake is a delightful dessert featuring tender cake layers filled with a creamy custard made from fresh rhubarb. It’s perfect for any occasion!
Can I use frozen rhubarb for this cake?
Yes, you can use frozen rhubarb! Just ensure it’s thawed and drained of excess moisture before adding it to your batter.
How do I know when my Rhubarb Custard Cake is done?
The cake is done when a toothpick inserted into the center comes out clean or with just a few moist crumbs clinging to it.
Can I customize my Rhubarb Custard Cake?
Absolutely! You can add spices like cinnamon or nutmeg, or even mix in other fruits like strawberries for added flavor.
How should I serve Rhubarb Custard Cake?
This cake is delicious on its own or served warm with whipped cream or vanilla ice cream for an extra treat!
Final Thoughts
The Rhubarb Custard Cake offers a beautiful blend of flavors that your family and friends will love. Its versatility allows you to customize it with different fruits or spices. Don’t hesitate to try this delightful dessert; it’s sure to impress anyone who tastes it!

Rhubarb Custard Cake
Rhubarb Custard Cake is a delightful dessert that harmoniously blends the tartness of fresh rhubarb with a creamy custard filling, all enveloped in a soft, buttery cake. This visually stunning treat is perfect for family gatherings, casual tea parties, or any special occasion. Its unique texture and delicious flavor combination are sure to impress your guests and keep them coming back for seconds. Whether served warm with whipped cream or chilled alongside fresh berries, this cake offers versatility that appeals to both kids and adults alike.
- Total Time: 1 hour 50 minutes
- Yield: Serves approximately 8 people 1x
Ingredients
- 2 tablespoons custard powder
- 200 g unsalted butter
- 110 g caster sugar
- 250 ml full cream milk
- 2 eggs
- 185 g plain flour
- Fresh rhubarb stalks
Instructions
- Preheat your oven to 180°C (350°F).
- In a saucepan, combine custard powder, caster sugar, and milk. Cook over medium heat until thickened. Stir in butter and vanilla extract; let cool.
- Cream together softened butter and caster sugar until fluffy, then add eggs one at a time.
- Gradually mix in sifted flour and baking powder.
- Pour half the batter into a greased baking dish, spread custard on top, then cover with remaining batter.
- Top with chopped rhubarb mixed with melted butter and granulated sugar.
- Bake for about 90 minutes or until golden brown.
- Prep Time: 20 minutes
- Cook Time: 90 minutes
- Category: Dessert
- Method: Baking
- Cuisine: American
Nutrition
- Serving Size: 1 serving
- Calories: 290
- Sugar: 18g
- Sodium: 120mg
- Fat: 14g
- Saturated Fat: 8g
- Unsaturated Fat: 5g
- Trans Fat: 0g
- Carbohydrates: 38g
- Fiber: 1g
- Protein: 4g
- Cholesterol: 60mg
Keywords: Use room temperature ingredients for better mixing. Choose firm, vibrant rhubarb for optimal flavor. Allow the cake to cool before slicing to maintain its structure.