Pour the milk into a medium saucepan and heat over medium heat until you see steam rising and tiny bubbles forming around the edges — don't let it boil. This gentle heating prevents the custard from curdling later.
⏱ 5 min
While the milk heats, whisk the egg yolks, sugar, and cornstarch in a bowl until the mixture is completely smooth and pale yellow. Make sure no lumps of cornstarch remain — they'll create a gritty custard.
Pour about half the hot milk into the egg mixture in a thin, steady stream while whisking constantly. This tempering process prevents the eggs from scrambling. Add the remaining milk gradually, still whisking.
Pour the mixture back into the saucepan and cook over medium-low heat, stirring constantly with a whisk or wooden spoon, until it thickens enough to coat the back of a spoon. The custard should hold ribbon-like trails when you lift the spoon.
⏱ 8 min
Remove from heat immediately and stir in the vanilla extract. Press plastic wrap directly onto the surface of the custard to prevent a skin from forming, then let it cool completely at room temperature.
Toss the berries with sugar in a bowl and let them macerate — the sugar will draw out their natural juices to create a light syrup that adds sweetness and prevents the berries from bleeding into other layers.
⏱ 15 min
Beat the cold heavy cream and powdered sugar with an electric mixer until soft peaks form. Don't overwhip — you want pillowy cream that holds its shape but isn't stiff.
Arrange half the cake slices in the bottom of a large glass trifle bowl or deep serving dish, fitting them snugly together. Drizzle evenly with half the sherry, allowing it to soak into the cake.
Spread half the cooled custard over the cake layer, smoothing it gently to the edges. The custard should be thick enough to hold its shape but spreadable.
Spoon half the macerated berries and their juices over the custard layer, distributing them evenly for consistent flavor throughout.
Repeat the layering process: remaining cake slices, remaining sherry, remaining custard, then remaining berries. Press each layer gently to ensure good contact.
Spread the whipped cream evenly over the top layer, creating decorative swirls if desired. Scatter toasted almonds over the cream for added texture and visual appeal.
Cover and refrigerate for at least 2 hours to allow the flavors to meld and the layers to set properly. The trifle actually improves with overnight chilling, making it perfect for entertaining.
⏱ 2 hrs