Preheat oven to 350. Mix your cake mix, 2 eggs, melted butter by hand then spread in a greased 13x9 baking dish.
In a mixer mix powdered sugar, cream cheese, other 2 eggs, and vanilla and pour over strawberry batter.
Then I Drop small spoonfuls of strawberry jam onto cream cheese mixture and swirl it gently. Bake at 350 for 40 minutes or until cake test done in center. remove and let cool. Sprinkle top of cake with extra powdered sugar.