
Preheat oven to 350°F. Prepare cake according to package directions and bake until a toothpick comes out clean. Cool completely and poke holes in the cake.
Combine first box of strawberry gelatin with boiling water until dissolved, then mix with cold water and pour over the cake. Refrigerate for at least 4 hours.
Beat cream cheese until smooth. Whip heavy cream with sugar and vanilla until stiff peaks form and fold in cream cheese. Frost the chilled cake.
Mix crushed Oreos, melted butter, and second box of strawberry gelatin powder for topping. Spread over frosted cake and optionally top with fresh strawberries.