01 - Preheat oven to 350°F. Grease a 9x13-inch baking pan thoroughly with cooking spray or butter.
02 - In a large bowl, whisk together the strawberry cake mix, eggs, vegetable oil, and water until just combined. Pour batter evenly into prepared pan.
03 - In a separate bowl, beat cream cheese and butter until smooth and creamy. Add powdered sugar and vanilla extract; continue beating until fluffy and well incorporated.
04 - Drop spoonfuls of cream cheese mixture randomly over surface of cake batter, distributing evenly across pan.
05 - Sprinkle diced strawberries and white chocolate chips evenly over top. Add shredded coconut if using.
06 - Use a butter knife to gently swirl cream cheese mixture through batter, creating marbled pattern. Do not overmix.
07 - Bake for 40-45 minutes until edges are set but center remains slightly wobbly. The gooey texture is intentional, so avoid overbaking.
08 - Cool in pan for at least 30 minutes before slicing and serving. Cake will continue to set as it cools.