Creamy Chocolate Éclair Custard Dessert
- Prep time: 20 minutes
- Cook time: 15 minutes
- Chill time: 4 hours (essential for setting)
- Yields: 6–8 servings
Ingredients
For the Vanilla Custard Base
- 4 cups whole milk
- 1 can (14 oz) sweetened condensed milk
- 4 large egg yolks
- 4 tbsp cornstarch
- 1 tbsp vanilla extract
- 1 tbsp unsalted butter
For the Chocolate Ganache Topping
- 1 cup semi-sweet or milk chocolate chips (or finely chopped chocolate blocks)
- 1/2 cup heavy whipping cream
- 1 tbsp unsalted butter (for extra glossiness)
Step-by-Step Instructions
Step 1: Make the Custard Base
- Whisk the cold base: In a large, heavy-bottomed saucepan before turning on the heat, whisk together the cold whole milk, sweetened condensed milk, egg yolks, and cornstarch until the cornstarch completely dissolves and no lumps remain.
- Thicken on the stove: Place the saucepan over medium heat. Whisk constantly to prevent the bottom from scorching. As it heats up (about 8–10 minutes), the mixture will suddenly thicken into a rich, smooth, pudding-like custard.
- Finish the flavor: As soon as it thickens and begins to bubble gently, remove it from the heat. Immediately stir in the vanilla extract and 1 tablespoon of butter until melted and fully incorporated.
- Pour and cool: Pour the hot custard into a round glass dish or an 8×11-inch baking pan, smoothing the top with a spatula. Let it sit on the counter to cool slightly while you make the chocolate layer.
Step 2: Make the Chocolate Ganache
- Heat the cream: In a small microwave-safe bowl, heat the heavy whipping cream for about 45–60 seconds until it is hot but not boiling.
- Melt the chocolate: Add the chocolate chips and 1 tablespoon of butter into the hot cream. Let it sit completely undisturbed for 2 minutes to let the chocolate melt from the residual heat.
- Whisk smooth: Using a small spoon or whisk, gently stir from the center outward until the cream and chocolate completely combine into a glossy, velvety dark sauce.
Step 3: Layer and Chill
- Assemble: Carefully pour the chocolate ganache over the top of your warm custard layer, tilting the dish gently so the chocolate coats the surface in a perfectly even, level sheet just like in the photo.
- Chill completely: Let the dish cool on the counter for 20 minutes, then place it uncovered in the refrigerator for at least 4 hours (or overnight). The custard needs this time to firm up completely so it can be cleanly sliced and scooped out with a spatula!
Pro-Tip: To get that absolute picture-perfect slice when serving, dip your serving spatula into a glass of hot water and wipe it dry with a towel before slicing into the dessert. The warm metal will slide right through the chocolate ganache beautifully!

