Preheat your oven according to the boxed cake mix instructions to around 350°F (175°C). Grease and flour a cake pan, then pour in the prepared batter. Bake for 25-30 minutes until a toothpick inserted into the center comes out clean. Allow to cool completely before crumbling into small pieces.

In a mixing bowl, add either whipped cream or mascarpone. Beat with a hand mixer or whisk until reaching soft peaks, about 3-5 minutes. Set aside the creamy filling.

In a large clear bowl, layer crumbled cake, followed by the creamy filling, and then a layer of mixed fresh fruits. Repeat the layers until all ingredients are used, finishing with the creamy topping.

Cover the assembled trifle with plastic wrap or a lid. Chill in the refrigerator for at least 2 hours to allow flavors to meld beautifully.

Once chilled, remove from the refrigerator and optionally add extra whipped cream and garnish with fruit or sprinkles. Serve in individual cups or a grand bowl.