01 - Preheat oven to 350°F. Grease a 9x13-inch baking pan thoroughly with cooking spray or butter.
02 - Combine strawberry cake mix, eggs, vegetable oil, and water in a large bowl. Whisk until just blended, then spread evenly into prepared pan.
03 - Beat softened cream cheese and butter in a separate bowl until smooth. Incorporate powdered sugar and vanilla extract, mixing until creamy and fluffy.
04 - Drop dollops of cream cheese mixture randomly across the cake batter surface.
05 - Scatter diced strawberries and white chocolate chips evenly over the batter. Sprinkle with shredded coconut if desired.
06 - Draw a butter knife through the batter and filling in swirling motions to marble, being careful not to overmix.
07 - Bake for 40-45 minutes until edges are firm but center remains slightly wobbly. The gooey texture is intentional.
08 - Let cake rest in pan for 30 minutes minimum before cutting. Serve warm or at room temperature.