In a mixing bowl, combine the sliced strawberries with the granulated sugar and 1 teaspoon of vanilla extract. Gently stir the mixture to ensure the strawberries are coated in sugar. Allow it to sit for about 15 minutes, letting the strawberries macerate and release their delicious juices.
In a clean mixing bowl, use an electric mixer to whip the heavy cream until it begins to thicken. Gradually add in the powdered sugar and the remaining teaspoon of vanilla extract, continuing to whip until soft peaks form.
Cut the sponge cake into approximately 1-inch cubes, ensuring they are bite-sized for easy layering.
In a large trifle dish (or individual serving glasses), start layering your ingredients thoughtfully: First, place a layer of sponge cake cubes at the bottom. Next, spoon on a layer of the macerated strawberries, including some of their flavorful juices. Follow this with a generous layer of vanilla pudding. Finally, add a layer of your freshly whipped cream.
Repeat these layers until you reach the top of your dish, ensuring that your final layer is a luscious mound of whipped cream for a stunning finish.
For a decorative touch, garnish the top with additional sliced strawberries and sprigs of fresh mint, if desired.
Chill the assembled trifle in the refrigerator for at least 1 hour before serving, allowing the flavors to meld beautifully.
Notes
Serve in clear glass bowls to showcase the layers. Garnish with mint for elegance.