01 -
Combine whole milk and vanilla extract in a shallow bowl. Dip pound cake cubes briefly to absorb the liquid, then set aside on a tray.
02 -
Heat whole milk in a medium saucepan over medium heat until steaming but not boiling. In a separate bowl, whisk together granulated sugar, cornstarch, and salt. Whisk egg yolks in another bowl. Slowly add the hot milk to the egg yolks while whisking constantly to temper, then return mixture to saucepan. Cook over medium heat, stirring constantly, until thickened and the custard coats the back of a spoon, about 8–10 minutes. Remove from heat and stir in vanilla extract. Cool completely before use.
03 -
In a medium bowl, combine mixed berries, granulated sugar, and lemon juice. Stir gently to coat and let sit for 10–15 minutes, allowing the berries to release their juices.
04 -
In a chilled large bowl, beat heavy whipping cream, powdered sugar, and vanilla extract on medium speed with an electric mixer until soft peaks form. Do not over-mix.
05 -
In a large glass trifle bowl or individual glasses, layer one-third of the soaked pound cake cubes, followed by one-third of the custard, then one-third of the macerated berries, and one-third of the whipped cream. Repeat the layers twice more, finishing with a generous layer of whipped cream on top.
06 -
Scatter additional berries and fresh mint leaves over the top. Cover the trifle with plastic wrap and chill for at least 2 hours to allow flavors to meld before serving.