Three layer custard cake is a thin batter that separates in the oven into a soft cake base, a creamy custard middle, and a light sponge top.
The method is easy but patient: whip the whites, fold gently, and bake at a low 325 degrees F. The cake then needs about 2 hours to cool and set before it slices cleanly.
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Why This Three Layer Custard Cake Recipe Works
The batter is thin and made with a lot of milk, and the layers form on their own in the oven as the heavier yolk mixture settles and the egg whites rise.
Beating the whites to stiff peaks and folding them in one third at a time keeps the top layer light and airy.
A low oven gives a gentle, even bake, so the custard layer stays creamy and the top turns lightly golden.
Ingredients for Three Layer Custard Cake
- 4 large eggs, separated, at room temperature
- 3/4 cup sugar
- 1 tsp vanilla extract
- 8 tbsp unsalted butter, melted
- 3/4 cup all-purpose flour
- 2 cups whole milk, lukewarm
- 1 tbsp powdered sugar, for dusting
- Fresh strawberries, optional
- Whipped cream, optional
Eggs. Separate them while cold, then let the whites come to room temperature so they whip up with more volume.
Butter. Melted butter adds richness to the base layer, and it should not be hot when the milk goes in.
Flour. Only 3/4 cup is used, which is why the batter is thin and the layers separate.
Milk. Use whole milk, warmed slightly, since the lukewarm temperature blends the batter smoothly.
Vanilla. Pure vanilla extract flavors the whole cake, so measure a full teaspoon.
How to Make Three Layer Custard Cake
1. Prepare the pan Heat the oven to 325 degrees F and butter an 8×8 inch square pan.
2. Whip the whites Beat the egg whites until stiff peaks form and set aside.
3. Beat the yolks In a second bowl, beat the yolks and sugar about 1 minute until pale.
4. Add butter and vanilla Mix in the vanilla and melted butter for 30 to 60 seconds, then beat in the flour gradually.
5. Add the milk Pour in the milk slowly, in quarters if using a hand mixer, until the batter is smooth and very thin.
6. Fold the whites Fold the whites into the batter one third at a time and stop when only a few small lumps remain.
7. Bake Pour the batter into the pan and bake 40 to 50 minutes until the top is golden and a toothpick in the center comes out clean.
8. Cool and chill Cool in the pan for 1 hour, then refrigerate for at least 1 hour before slicing into 9 squares.
How to Serve Three Layer Custard Cake
Dust the squares with powdered sugar and serve with whipped cream and fresh strawberries. For a dessert tray, add strawberry cake, strawberry yogurt cake, moist vanilla cake, and streusel coffee cake.
How to Store and Reheat Three Layer Custard Cake
Cover the cut squares and refrigerate for up to 3 days. Serve chilled or let squares sit at room temperature for 15 minutes, but do not leave them out longer than 2 hours. Freezing is not recommended because the custard layer turns watery.
Tips and Variations for Three Layer Custard Cake
Whip to stiff peaks. Stiff peaks give the top layer its light, airy texture.
Fold gently. Small lumps of egg white are fine, and overmixing will deflate the batter.
Use lukewarm milk. Cold milk can firm up the melted butter and make the batter lumpy.
Do not use skim milk. Whole or low fat milk gives better layers than fat free.
Line the pan. Parchment overhanging the sides makes lifting out the cake easy.
Chill before cutting. The custard layer firms up in the fridge, so cut after chilling for neat edges.
Avoid opening the oven. Opening the door in the first 30 minutes can make the top sink.
Know the safety basics. This cake contains a milk and egg custard, so keep it chilled and follow this UMN leftovers guide.
Frequently Asked Questions About Three Layer Custard Cake
Why did my three layer custard cake not form layers?
The batter was likely too thick, or the whites were overmixed. Use a thin batter and fold gently.
How do you know a three layer custard cake is done?
The top is golden and the center barely jiggles. A toothpick should come out clean.
Can I make a three layer custard cake in a bigger pan?
A 9×9 pan works with a shorter baking time. Check about 5 minutes earlier.
Should this cake be served warm or cold?
Cold is best, since the custard layer is firmest after chilling.
Can I use cream instead of milk?
No. The batter needs to be thin to separate into layers.
Three Layer Custard Cake
Equipment
- 8×8 inch baking pan
- Electric mixer
- Rubber spatula
Ingredients
Main Ingredients
- 4 large eggs separated, at room temperature
- ¾ cup sugar
- 1 tsp vanilla extract
- 8 tbsp unsalted butter melted, 1 stick
- ¾ cup all-purpose flour
- 2 cup whole milk lukewarm
- 1 tbsp powdered sugar for dusting
- 1 cup sliced strawberries optional, for serving
- ½ cup whipped cream optional, for serving
Instructions
Cooking
- Prep. Heat the oven to 325 degrees F and butter an 8×8 inch pan.
- Whites. Beat the egg whites to stiff peaks and set them aside.
- Yolk base. Beat the yolks and sugar until pale, then mix in the vanilla and melted butter.
- Flour and milk. Beat in the flour, then add the lukewarm milk in additions until smooth.
- Fold. Gently fold in the whites one third at a time.
- Bake. Pour into the pan and bake 40 to 50 minutes until golden and set.
- Chill. Cool 1 hour, refrigerate 1 hour, dust with powdered sugar, and cut into 9 squares.
