Name: Rich Chocolate Custard Cake
Prep time: 30 min
Cook time: 30 min
Total time: 6 h 30 min
Cuisine: American
Ingredients: For the chocolate cake layer:; 160g all-purpose flour (1 1/3 cups); 60g unsweetened cocoa powder (2/3 cup); 1 tsp baking powder; 1/2 tsp baking soda; 1/4 tsp salt; 200g granulated sugar (1 cup); 2 large eggs; 120ml vegetable oil or melted butter (1/2 cup); 120ml milk or buttermilk (1/2 cup); 1 tsp vanilla extract; 120ml hot water or coffee (1/2 cup); For the custard layer:; 4 large egg yolks; 100g granulated sugar (1/2 cup); 3 tbsp cornstarch; 480ml whole milk (2 cups); 170g dark chocolate, chopped (6 oz); 2 tbsp unsalted butter; 1 tsp vanilla extract; For the chocolate glaze (optional):; 115g dark or semisweet chocolate, chopped (4 oz); 120ml heavy cream (1/2 cup); 1 tbsp butter (optional, for shine)

Why You’ll Love This Recipe

This dessert is a dream come true for anyone who loves rich, layered cakes with a creamy surprise. The contrast between the dense cake, the luscious custard, and the fudgy chocolate topping creates a luxurious mouthfeel and flavor. It’s elegant enough for special occasions, yet comforting enough to enjoy anytime. Plus, it’s surprisingly simple to put together with a bit of planning.

Ingredients

(Tip: You’ll find the full list of ingredients and measurements in the recipe card below.)

For the chocolate cake layer:
all-purpose flour
unsweetened cocoa powder
baking powder
baking soda
salt
granulated sugar
eggs
vegetable oil or melted butter
milk or buttermilk
vanilla extract
hot water or coffee

For the custard layer:
egg yolks
granulated sugar
cornstarch
whole milk
dark chocolate (chopped or chips)
unsalted butter
vanilla extract

For the chocolate glaze (optional):
dark or semisweet chocolate
heavy cream
butter (optional for shine)

Directions

Make the cake layer:
- Preheat oven to 350°F (175°C). Grease and line a springform or deep round cake pan.
- In a bowl, mix flour, cocoa, baking powder, baking soda, salt, and sugar.
- In another bowl, whisk eggs, milk, oil, and vanilla. Add to dry ingredients and mix until smooth.
- Stir in hot water or coffee. Batter will be thin.
- Pour into the pan and bake for 25–30 minutes or until a toothpick inserted comes out clean. Let cool completely.
Make the custard layer:
- In a saucepan, whisk egg yolks, sugar, and cornstarch until smooth.
- Gradually whisk in milk and cook over medium heat, stirring constantly until it thickens.
- Remove from heat and stir in chopped chocolate, butter, and vanilla until smooth.
- Let custard cool slightly, then pour over the cooled cake layer.
- Refrigerate until fully set, about 4 hours or overnight.
Make the glaze (optional):
- Heat cream until simmering, then pour over chopped chocolate. Let sit 1 minute, then stir until smooth.
- Stir in a small amount of butter if desired for extra shine.
- Pour glaze over the chilled custard layer and spread evenly. Refrigerate until set.
Slice and serve chilled or at room temperature.

Servings and timing

Serves 10–12
Prep time: 30 minutes
Bake time: 30 minutes
Chilling time: 4–6 hours
Total time: about 6.5 hours

Variations

Add a splash of coffee liqueur to the custard for depth.
Use white or milk chocolate in the custard for a different twist.
Make individual portions in ramekins or silicone molds.
Add a layer of whipped cream or ganache between the custard and glaze.
Sprinkle sea salt or chocolate shavings on top for garnish.

Storage/Reheating

Store the cake in the refrigerator, covered, for up to 5 days. It’s best served chilled. Freezing is not recommended due to the custard layer, which may separate after thawing. Avoid reheating—this cake is meant to be enjoyed cold or at room temperature.

FAQs

Can I make this cake ahead of time?

Yes, it’s best made the day before to allow the custard layer to fully set.

Does the custard need to be cooked?

Yes, the custard must be thickened on the stove to ensure it sets properly and is safe to eat.

Can I use boxed cake mix for the base?

Absolutely. A high-quality chocolate cake mix will work if you’re short on time.

How do I prevent the custard from curdling?

Cook it slowly over medium heat and stir constantly. Don’t let it boil.

What type of chocolate is best for the custard?

Use dark or semisweet chocolate with good melting quality for a rich and smooth custard.

Can I skip the glaze?

Yes, the cake is delicious with just the custard, but the glaze adds a beautiful finish.

Can I make this gluten-free?

Yes, use a 1:1 gluten-free flour blend in the cake base.

How do I get clean slices?

Use a sharp knife dipped in hot water and wipe between each cut.

What if the custard doesn’t set?

It may need more chilling time, or you may need to increase the cornstarch slightly next time.

Can I use a different pan?

A springform pan works best for neat layers and easy removal, but any deep round cake pan will do.

Conclusion

Rich Chocolate Custard Cake is a luxurious dessert that layers bold chocolate flavor with velvety custard and an optional glossy glaze. It’s a showstopper that’s worth the chill time and perfect for any occasion where you want to impress. Once you try it, this cake will become a go-to favorite for when only the richest, most indulgent chocolate dessert will do.