01 - Preheat oven to 350°F. Grease a 9x13-inch baking pan thoroughly.
02 - Combine strawberry cake mix, eggs, oil, and water in a large bowl. Mix according to package directions until smooth. Pour batter evenly into prepared pan.
03 - Beat softened cream cheese, butter, powdered sugar, and vanilla extract in a separate bowl until smooth and creamy.
04 - Drop spoonfuls of cream cheese mixture evenly over the cake batter, leaving spaces between dollops.
05 - Scatter diced strawberries and white chocolate chips over the top. Sprinkle with shredded coconut if desired.
06 - Using a knife, gently swirl the cream cheese mixture into the cake batter to create a marbled effect. Do not overmix.
07 - Bake for 40-45 minutes until cake is mostly set but still slightly gooey in the center. The texture should remain molten.
08 - Cool in pan for at least 30 minutes before slicing. Serve slightly warm or at room temperature.