01 - Preheat oven to 350°F. Grease a 9x13-inch baking dish thoroughly with cooking spray or butter.
02 - Combine strawberry cake mix, eggs, vegetable oil, and water in a large bowl. Beat with electric mixer on medium speed for 2 minutes until batter is smooth and well blended. Pour batter evenly into prepared baking dish.
03 - Beat softened cream cheese and butter together in a separate bowl until creamy and smooth. Add powdered sugar and vanilla extract. Continue beating on medium-high speed for 2-3 minutes until fluffy and no lumps remain.
04 - Drop spoonfuls of cheesecake mixture randomly over the cake batter. Use a knife or skewer to gently swirl through both layers, creating a marbled pattern. Avoid over-mixing to maintain distinct swirls.
05 - Sprinkle diced strawberries, white chocolate chips, and shredded coconut (if using) evenly over the surface of the swirled batter.
06 - Bake for 40-45 minutes until edges are set and lightly golden, but center remains slightly gooey. The cake will have a cracked, earthquake-like appearance.
07 - Let cake cool in pan for at least 30 minutes before slicing. Serve warm or at room temperature.