Preheat the oven to 350 degrees, grease a 9×13″ pan, set aside.
Mix cake according to package directions.
Pour batter into the prepared pan.
Sprinkle with white chocolate chips.
Mix the melted butter, cream cheese and vanilla together until combined.
Add the powdered sugar and mix until incorporated.
Fold in strawberries.
Spoon dollops of cream cheese mixture over cake, swirl gently with a knife.
Bake for 40-45 minutes. Remove from the oven and let cool.
Cut into slices and top with whipped cream and strawberries if desired.