This Easy Rhubarb Custard Cake is a delightful treat that perfectly balances tart rhubarb with a creamy, sweet custard filling. It’s a simple yet elegant dessert that’s perfect for any occasion, especially when rhubarb is in season.
Why You Will Love This Recipe
You will adore this Easy Rhubarb Custard Cake because it’s incredibly forgiving and bursting with flavor. The combination of tender, slightly tart rhubarb with a smooth, luscious custard creates a symphony of tastes and textures. It’s remarkably easy to make, requiring no special equipment or advanced baking skills, making it a perfect choice for beginner bakers or for those seeking a quick, impressive dessert. The vibrant pink of the rhubarb adds a beautiful visual appeal, making it a showstopper on any dessert table.
Ingredients
- 2 cups all-purpose flour
- 1 teaspoon baking powder
- 1/2 teaspoon salt
- 1 cup (2 sticks) unsalted butter, softened
- 1 1/2 cups granulated sugar
- 3 large eggs
- 1 teaspoon vanilla extract
- 1/2 cup milk
- 2 cups chopped fresh rhubarb (about 1/2-inch pieces)
- Custard Topping:
- 1/2 cup granulated sugar
- 2 tablespoons cornstarch
- 1/4 teaspoon salt
- 2 large egg yolks
- 1 1/2 cups milk
- 1 tablespoon unsalted butter
- 1 teaspoon vanilla extract
Step-by-Step Instructions
- Preheat your oven to 350°F (175°C). Grease and flour a 9×13 inch baking pan.
- In a medium bowl, whisk together the flour, baking powder, and salt. Set aside.
- In a large bowl, cream together the softened butter and 1 1/2 cups granulated sugar until light and fluffy.
- Beat in the eggs one at a time, then stir in the vanilla extract.
- Gradually add the dry ingredients to the wet ingredients, alternating with the 1/2 cup milk, beginning and ending with the dry ingredients. Mix until just combined, being careful not to overmix.
- Gently fold in the chopped rhubarb.
- Spread the batter evenly into the prepared baking pan.
- Prepare the custard topping: In a medium saucepan, whisk together the 1/2 cup granulated sugar, cornstarch, and 1/4 teaspoon salt.
- In a separate small bowl, whisk the egg yolks.
- Gradually whisk the 1 1/2 cups milk into the sugar mixture. Cook over medium heat, stirring constantly, until the mixture thickens and comes to a boil. Boil for 1 minute.
- Slowly temper the egg yolks by whisking a small amount of the hot milk mixture into them. Then, gradually whisk the tempered egg yolks back into the saucepan.
- Cook for another 1-2 minutes, stirring constantly, until thickened. Remove from heat and stir in the 1 tablespoon butter and 1 teaspoon vanilla extract.
- Pour the warm custard evenly over the cake batter in the baking pan.
- Bake for 45-55 minutes, or until a wooden skewer inserted into the cake part comes out clean and the custard topping is set and lightly golden brown.
- Let the cake cool completely in the pan on a wire rack before slicing and serving.
Expert Tips / Pro Tips
For the best results, ensure your butter is truly softened, not melted. This will make creaming easier and create a lighter cake texture. When folding in the rhubarb, do so gently to avoid breaking it down too much, which can lead to a mushy cake. For the custard, tempering the egg yolks is crucial; adding them too quickly can cause them to scramble. Whisking constantly over medium heat prevents sticking and ensures a smooth consistency. Don’t overbake the cake; keep an eye on it during the last 10-15 minutes of baking. The custard should be set but may still have a slight jiggle.
Variations & Substitutions
If rhubarb is out of season or not to your liking, you can substitute it with other fruits. Sliced strawberries, raspberries, or even diced apples (tossed with a little cinnamon) work wonderfully. For a richer flavor, you can add a teaspoon of lemon zest to the cake batter. If you prefer a more pronounced custard flavor, consider adding a tablespoon of heavy cream to the custard mixture. For a dairy-free option, use a plant-based butter, milk, and a dairy-free egg yolk substitute for the custard.
Serving Suggestions
This Easy Rhubarb Custard Cake is delicious served warm or at room temperature. It pairs beautifully with a dollop of whipped cream, a scoop of vanilla ice cream, or a light dusting of powdered sugar. For an extra touch of elegance, garnish with a few fresh mint leaves or a sprig of rhubarb. It’s also lovely with a cup of tea or coffee.
Storage, Freezing & Reheating
Store any leftover cake in an airtight container at room temperature for up to 2 days. If the weather is warm or you plan to store it longer, refrigerate it for up to 4 days. To freeze, wrap individual slices tightly in plastic wrap, then in aluminum foil. Freeze for up to 3 months. Thaw in the refrigerator overnight. Reheat gently in a low oven (around 300°F/150°C) for slices, or serve chilled.
Nutrition Information
| Calories | XXX kcal |
| Protein | XX g |
| Fat | XX g |
| Saturated Fat | XX g |
| Carbohydrates | XXX g |
| Sugar | XX g |
| Fiber | X g |
| Cholesterol | XX mg |
| Sodium | XXX mg |
Note: Nutrition information is an estimate and can vary based on ingredients used.
FAQ
What is the best way to prepare rhubarb for this cake?
Wash the rhubarb stalks thoroughly, trim off the ends, and chop them into approximately 1/2-inch pieces. Avoid using the leaves, as they are toxic. You can peel the stalks if they are particularly tough or fibrous, but it’s usually not necessary for younger stalks.
Why is my custard topping not setting?
This usually happens if the custard wasn’t cooked long enough or if the heat was too high and caused it to break. Ensure you cook it until it boils and then for the additional minute to thicken properly. Also, make sure the egg yolks were properly tempered before adding them back to the hot mixture.
Can I make this cake ahead of time?
Yes, this cake can be prepared a day in advance. Allow it to cool completely before covering and storing it at room temperature or in the refrigerator. The flavors often meld nicely overnight.
How do I know when the cake is done?
A wooden skewer inserted into the cake portion should come out clean. The custard topping should be set and may have a golden-brown hue. There might be a slight jiggle in the center, which is normal as it will continue to set as it cools.
Is it necessary to use fresh rhubarb?
While fresh rhubarb is preferred for its vibrant flavor and texture, you can use frozen rhubarb. Thaw it completely and drain off any excess liquid before folding it into the batter. Be aware that frozen rhubarb might release more moisture during baking.
Easy Rhubarb Custard Cake
Ingredients
Method
- Preheat your oven to 180°C (160°C fan/350°F/Gas Mark 4). Grease and line a 20cm (8-inch) round cake tin with parchment paper.
- Prepare the rhubarb swirl: In a small saucepan, combine the chopped rhubarb, 50g granulated sugar, and 1 tablespoon of water. Cook over medium heat for 5-7 minutes, stirring occasionally, until the rhubarb is softened but still holds its shape. Set aside to cool.
- Make the cake batter: Cream together the softened butter and 175g caster sugar in a large bowl until light and fluffy. Beat in the eggs one at a time, adding a tablespoon of the sifted flour with each egg to prevent curdling. Stir in the vanilla extract.
- Gently fold in the remaining sifted flour. If the batter seems a little stiff, stir in the tablespoon of milk.
- Spoon half of the cake batter into the prepared cake tin and spread it evenly. Dollop spoonfuls of the cooled rhubarb mixture over the batter. Swirl gently with a skewer or knife.
- Spoon the remaining cake batter over the rhubarb and spread it to cover. Place the remaining rhubarb mixture on top and swirl again. Try not to overmix the swirls.
- Bake for 40-45 minutes, or until the cake is golden brown and a skewer inserted into the center comes out clean. Allow the cake to cool in the tin for 10 minutes before turning it out onto a wire rack to cool completely.