Ready to dive into the fun part? Let’s bake this beauty:

1. Preheat your oven to 350°F (175°C) and prepare the cake mix according to the package instructions. Pour the batter into a greased 9×13-inch baking dish.
2. Bake the cake in the preheated oven for about 25-30 minutes, or until a toothpick inserted in the center comes out clean.
3. Once baked, let the cake cool for about 10 minutes. Then, using the handle of a wooden spoon, poke holes all over the cake at 1-inch intervals.
4. In a small saucepan, combine the sweetened condensed milk and the optional strawberry gelatin over low heat. Stir until the gelatin dissolves completely.
5. Pour the mixture over the cake, ensuring it seeps into the holes. Let the cake cool to room temperature, then refrigerate for at least 1 hour.
6. For the topping, whip the heavy cream with powdered sugar and vanilla extract until stiff peaks form. Spread this luscious whipped cream over the cooled cake.
7. Top with your mixed fresh berries, arranging them in a festive pattern or scattering them freely—whatever your heart desires.

This cake is best served chilled, so refrigerate for another hour before slicing. It’s one of those desserts that gets better with time, much like the stories my dad used to tell.