A stunning Rhubarb Custard Cake with a thick custard layer baked in the center of the cake is sure to impress your family and friends. This delightful dessert balances the tartness of rhubarb with a creamy custard, creating a delicious treat for any occasion. Whether it’s an afternoon tea or a special gathering, this cake is perfect for sharing and celebrating.

Jump to:
- Why You’ll Love This Recipe
- Tools and Preparation
- Essential Tools and Equipment
- Importance of Each Tool
- Ingredients
- For the Custard Layer
- For the Cake Base
- For Assembly
- How to Make Rhubarb Custard Cake
- Step 1: Prepare the Oven and Baking Pan
- Step 2: Make the Custard Layer
- Step 3: Prepare the Cake Batter
- Step 4: Assemble Your Cake
- Step 5: Bake Your Cake
- Step 6: Finish Up
- How to Serve Rhubarb Custard Cake
- With Fresh Cream
- With Ice Cream
- With Fruit Topping
- As Afternoon Tea
- With a Drizzle of Honey
- Garnished with Mint
- How to Perfect Rhubarb Custard Cake
- Best Side Dishes for Rhubarb Custard Cake
- Common Mistakes to Avoid
- Storage & Reheating Instructions
- Refrigerator Storage
- Freezing Rhubarb Custard Cake
- Reheating Rhubarb Custard Cake
- Frequently Asked Questions
- What makes this Rhubarb Custard Cake special?
- Can I use frozen rhubarb for this recipe?
- How do I know when my Rhubarb Custard Cake is done?
- Can I customize this Rhubarb Custard Cake recipe?
- Final Thoughts
- 📖 Recipe Card
Why You’ll Love This Recipe
- Deliciously Unique Flavor – The combination of tangy rhubarb and sweet custard makes every bite a delightful surprise.
- Versatile Serving Options – Enjoy it warm, at room temperature, or chilled. It pairs wonderfully with whipped cream or ice cream.
- Simple Preparation – With straightforward steps, even beginner bakers can create this impressive cake with ease.
- Perfect for Any Occasion – This cake is suitable for birthdays, holidays, or just a lovely dessert after dinner.
- Beautiful Presentation – The layers of custard and rhubarb create an eye-catching dessert that looks as good as it tastes.
Tools and Preparation
To make your baking experience smooth and enjoyable, having the right tools is essential. Gather your equipment and prepare to create this beautiful Rhubarb Custard Cake.
Essential Tools and Equipment
- Mixing bowls
- Whisk
- Measuring cups and spoons
- Baking pan (8-inch round)
- Rubber spatula
- Oven
Importance of Each Tool
- Mixing bowls – These are crucial for combining ingredients effectively without spills.
- Whisk – A whisk ensures your mixture is well-blended, especially when incorporating air into your batter.
- Baking pan – Using the correct size ensures even cooking and proper cake rise.

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 Base
- 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 Assembly
- 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: Prepare the Oven and Baking Pan
Preheat your oven to 160°C (320°F). Grease your baking pan with some butter or cooking spray to prevent sticking.
Step 2: Make the Custard Layer
- In a saucepan over medium heat, combine the milk, custard powder, caster sugar, unsalted butter, and vanilla extract.
- Stir continuously until it thickens. Remove from heat and let it cool slightly.
Step 3: Prepare the Cake Batter
- In a mixing bowl, cream together the softened unsalted butter and caster sugar until light and fluffy.
- Add in the eggs one at a time, mixing well after each addition.
- Combine plain flour and baking powder in another bowl. Gradually add this mixture to the wet ingredients until just combined.
Step 4: Assemble Your Cake
- Pour half of the cake batter into the prepared baking pan.
- Carefully spread the cooled custard layer over the batter.
- Chop rhubarb stalks into small pieces and sprinkle them over the custard layer.
- Top with remaining cake batter.
Step 5: Bake Your Cake
Bake in the preheated oven for about 1 hour and 30 minutes or until a toothpick inserted comes out clean.
Step 6: Finish Up
Once baked, allow your cake to cool in the pan for about 10 minutes before transferring it to a wire rack to cool completely before serving.
Enjoy your homemade Rhubarb Custard Cake!
How to Serve Rhubarb Custard Cake
Rhubarb Custard Cake is a delightful dessert that can be enjoyed in various ways. Whether you want to make it a centerpiece for a gathering or a casual treat, these serving suggestions will elevate your experience.
With Fresh Cream
- Serve slices of the rhubarb custard cake topped with a dollop of fresh cream for an indulgent touch.
With Ice Cream
- Pair the warm cake with vanilla or custard-flavored ice cream for a delicious contrast in temperatures and flavors.
With Fruit Topping
- Enhance the cake’s flavor by adding fresh berries or sliced fruit on top. Strawberries or raspberries complement the tartness of rhubarb beautifully.
As Afternoon Tea
- Enjoy a slice of this cake with your afternoon tea for a comforting and satisfying snack that pairs well with various teas.
With a Drizzle of Honey
- A light drizzle of honey over the top can add extra sweetness and richness, making each bite even more delightful.
Garnished with Mint
- Adding fresh mint leaves as a garnish not only enhances the presentation but also provides a refreshing herbal note that balances the sweetness.
How to Perfect Rhubarb Custard Cake
To ensure your Rhubarb Custard Cake turns out perfectly every time, consider these helpful tips for baking success.
- Choose Fresh Rhubarb: Use vibrant, firm rhubarb stalks for the best flavor and texture in your cake. Avoid wilted or discolored pieces.
- Measure Ingredients Accurately: For consistent results, measure all ingredients precisely. This helps achieve the right balance of flavors and textures in your cake.
- Allow Butter to Soften: Make sure your butter is softened at room temperature before mixing. This aids in achieving a light and fluffy batter.
- Monitor Baking Time: Keep an eye on your cake as it bakes. Ovens vary, so check for doneness about 10 minutes before the suggested time by inserting a skewer into the center; it should come out clean.
- Cool Before Serving: Allow the cake to cool completely before slicing. This helps set the custard layer and makes it easier to cut clean slices.
- Store Properly: If you have leftovers, store them in an airtight container in the fridge to keep them fresh. The cake can last up to three days when stored correctly.
Best Side Dishes for Rhubarb Custard Cake
Rhubarb Custard Cake pairs well with several side dishes that enhance its flavors and provide variety to your dessert spread. Here are some excellent options:
- Whipped Cream
Light and airy, whipped cream adds richness and balances the tartness of rhubarb perfectly. - Fruit Salad
A refreshing mix of seasonal fruits complements the cake’s flavor while adding brightness to your plate. - Custard Sauce
A warm or cold custard sauce can be poured over each slice, enhancing its creamy texture and flavor profile. - Yogurt Parfait
Layer yogurt with granola and fresh fruit for a healthy side dish that contrasts nicely with the sweet cake. - Cheese Platter
A selection of cheeses can provide savory notes that balance out the sweetness of the cake, creating an interesting flavor combination. - Coffee or Tea
Serving coffee or tea alongside adds warmth and comfort, making it perfect for cozy gatherings or afternoon snacks. - Chocolate Sauce
A drizzle of chocolate sauce offers an indulgent touch, appealing especially to chocolate lovers looking for rich flavor contrasts. - Coconut Flakes
Toasted coconut flakes sprinkled on top add texture and a hint of tropical flavor that plays nicely with rhubarb’s tartness.
Common Mistakes to Avoid
When making your Rhubarb Custard Cake, it’s essential to steer clear of common pitfalls that can affect the taste and texture.
- Overmixing the batter: This can lead to a dense cake. Mix just until combined for a light, fluffy texture.
- Not measuring ingredients accurately: Inaccurate measurements can alter the cake’s structure. Use a kitchen scale or measuring cups for precision.
- Skipping the cooling time: Cutting into the cake too soon can cause it to fall apart. Allow it to cool completely before slicing.
- Using old rhubarb: Fresh rhubarb is crucial for flavor. Ensure your rhubarb stalks are firm and vibrant in color.
- Ignoring oven temperature: Baking at the wrong temperature can result in uneven cooking. Always preheat your oven and use an oven thermometer for accuracy.

Storage & Reheating Instructions
Refrigerator Storage
- Store leftover Rhubarb Custard Cake in an airtight container.
- It will stay fresh for up to 3 days in the fridge.
Freezing Rhubarb Custard Cake
- Wrap portions of the cake tightly in plastic wrap and then foil.
- The cake can be frozen for up to 3 months.
Reheating Rhubarb Custard Cake
- Oven: Preheat to 160°C (320°F) and reheat for about 10-15 minutes until warmed through.
- Microwave: Heat individual slices on medium power for about 30 seconds or until warm.
- Stovetop: Place slices in a skillet over low heat, covering with a lid until heated through.
Frequently Asked Questions
Here are some commonly asked questions about making Rhubarb Custard Cake.
What makes this Rhubarb Custard Cake special?
This cake features a thick custard layer baked right into it, creating a unique texture and delightful taste that stands out from regular cakes.
Can I use frozen rhubarb for this recipe?
Yes, you can use frozen rhubarb. Just make sure to thaw and drain any excess moisture before adding it to the batter.
How do I know when my Rhubarb Custard Cake is done?
The cake should be golden brown on top, and a toothpick inserted into the center should come out clean or with only a few moist crumbs attached.
Can I customize this Rhubarb Custard Cake recipe?
Absolutely! You can add spices like cinnamon or nutmeg, or even include other fruits such as strawberries for extra flavor.
Final Thoughts
This Rhubarb Custard Cake is not only visually stunning but also incredibly delicious. Its unique combination of flavors makes it perfect for any occasion. Feel free to customize it with your favorite fruits or spices for a personal touch!
Did You Enjoy Making This Recipe? Please rate this recipe with ⭐⭐⭐⭐⭐ or leave a comment.
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Rhubarb Custard Cake
- Total Time: 1 hour 50 minutes
- Yield: Approximately 10 servings 1x
Description
Indulge in the delightful flavors of Rhubarb Custard Cake, a stunning dessert that features a luscious custard layer baked right into the cake. This recipe perfectly balances the tartness of fresh rhubarb with a creamy, sweet custard, making each bite a delightful surprise. Ideal for any occasion—from afternoon teas to family gatherings—this cake not only tastes amazing but also presents beautifully with its layered design. With simple preparation steps and easily accessible ingredients, even beginner bakers can create this impressive treat that’s sure to impress.
Ingredients
- 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
- 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
- 40 g (1/3 cup) custard powder
- 1–2 fresh rhubarb stalks
- 20 g (1 tablespoon) unsalted butter, melted
- 4 teaspoons granulated sugar
Instructions
- Preheat your oven to 160°C (320°F) and grease an 8-inch round baking pan.
- In a saucepan over medium heat, combine milk, custard powder, caster sugar, unsalted butter, and vanilla extract. Stir until thickened and set aside to cool.
- In a mixing bowl, cream softened butter and caster sugar until fluffy; add eggs one at a time.
- Mix plain flour and baking powder in another bowl; gradually incorporate into the wet mixture until combined.
- Pour half of the batter into the prepared pan, spread cooled custard on top, sprinkle chopped rhubarb, then cover with remaining batter.
- Bake for about 1 hour and 30 minutes or until a toothpick comes out clean. Let cool before serving.
- Prep Time: 20 minutes
- Cook Time: 90 minutes
- Category: Dessert
- Method: Baking
- Cuisine: Australian
Nutrition
- Serving Size: 1 serving
- Calories: 290
- Sugar: 18g
- Sodium: 150mg
- Fat: 14g
- Saturated Fat: 8g
- Unsaturated Fat: 5g
- Trans Fat: 0g
- Carbohydrates: 38g
- Fiber: 1g
- Protein: 4g
- Cholesterol: 50mg