Custard Cream Traybake Slice

This creamy, indulgent Custard Cream Traybake Slice transforms beloved British biscuits into a decadent no-bake dessert that will satisfy your sweet tooth without turning on the oven. The combination of crumbly custard cream base and smooth white chocolate topping creates the perfect balance of textures and flavors.

I first made this recipe during a particularly hot summer when turning on the oven seemed unbearable. Now it has become my trusty dessert solution whenever unexpected guests arrive, as it always elicits delighted reactions despite requiring minimal effort.

Ingredients

• 300g Custard Cream biscuits: these iconic British sandwich cookies provide the distinctive vanilla custard flavor that defines this dessert
• 100g melted butter: creates the perfect binding consistency for the base while adding richness
• 397g sweetened condensed milk: offers that distinctive caramelized sweetness and helps set the dessert without baking
• 300g white chocolate: creates a luxuriously smooth topping that complements the vanilla notes in the biscuits

Step-by-Step Instructions

Prepare the Pan:

Line an 8x8 inch square tin with baking paper, ensuring it comes up the sides for easy removal later. Take care to press the paper into the corners for clean edges on your finished slices.

Create the Biscuit Base:

Add Custard Cream biscuits to a food processor and process until you have fine, even crumbs with no large pieces remaining. This typically takes about 30 seconds of continuous processing. Transfer the crumbs to a large mixing bowl, add all the melted butter and 80ml of condensed milk. Mix thoroughly until every crumb is moistened and the mixture holds together when pressed.

Form the Base Layer:

Press the biscuit mixture firmly into your prepared tin, creating an even layer. Use the back of a spoon or the bottom of a measuring cup to compact it thoroughly, especially around the edges. A firmly packed base will hold together better when sliced.

Create the Topping:

Break the white chocolate into small pieces and place in a heatproof bowl along with the remaining condensed milk. Melt gently over a double boiler, stirring constantly to ensure the mixture combines smoothly without overheating. The mixture should look thick and glossy when properly melted.

Assemble the Layers:

Working quickly before the chocolate begins to set, pour the white chocolate mixture over the biscuit base. Use a rubber spatula to spread it evenly across the entire surface, ensuring it reaches all corners. For a decorative touch, arrange additional whole Custard Cream biscuits on top, pressing them lightly into the chocolate layer.

Chill to Set:

Refrigerate the traybake for a full 3 hours until the topping is completely firm to the touch. This setting time is essential for clean slices and proper texture, so avoid rushing this step.

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You Must Know

My favorite part of making this recipe is always the moment I slice into the finished traybake. The clean contrast between the speckled biscuit base and creamy white topping never fails to make me feel like a proper pastry chef, despite the minimal effort involved.

Storage Instructions

This traybake holds beautifully in the refrigerator for up to 5 days when stored in an airtight container. I recommend placing pieces of parchment paper between layers if stacking to prevent the slices from sticking together. The flavor actually improves after 24 hours as the base softens slightly and the flavors meld together.

Smart Substitutions

While authentic Custard Creams give this dessert its signature flavor, you can experiment with other sandwich cookies. Vanilla Oreos work wonderfully for an American twist, though you may need slightly less butter due to their filling. Golden Oreos also make a good substitute when Custard Creams are unavailable. For a different flavor profile, try using Bourbon biscuits with milk chocolate for the topping instead.

Serving Suggestions

While these slices are perfect enjoyed straight from the refrigerator, they become even more special with thoughtful presentation. Try serving with a small dollop of freshly whipped cream and a scattering of fresh berries to cut through the sweetness. For an extra indulgent dessert, drizzle each slice with a little caramel sauce just before serving. These treats pair beautifully with afternoon tea or coffee.

Frequently Asked Questions About Recipes

→ Can I use a different type of biscuit?

Yes, you can swap Custard Cream biscuits with your favorite type of biscuit for a different flavor profile.

→ How long does it take to set?

This traybake requires 3 hours of chilling in the refrigerator to set properly.

→ What type of white chocolate works best?

Use high-quality white chocolate for the best flavor and smooth texture in the topping.

→ How should I store the traybake slices?

Store the slices in an airtight container in the fridge for up to 5 days.

→ Can I make this dessert ahead of time?

Yes, the traybake is perfect for making ahead as it can be refrigerated for a few days before serving.