01 - Preheat oven to 350°F. Grease a 9x13-inch baking dish thoroughly with cooking spray or butter.
02 - In a large bowl, combine strawberry cake mix, eggs, vegetable oil, and water. Mix with electric mixer on medium speed for 2 minutes until well blended and smooth. Spread evenly into prepared baking dish.
03 - In a separate bowl, beat softened cream cheese and butter together until smooth and creamy, about 2 minutes. Add powdered sugar and vanilla extract; continue beating until fully combined and fluffy.
04 - Drop spoonfuls of cream cheese mixture randomly over the cake batter, leaving some spaces between dollops.
05 - Run a knife or skewer through the batter and cream cheese mixture in swirling motions, creating a marbled pattern. Do not overmix—maintain distinct swirls.
06 - Sprinkle white chocolate chips, chopped strawberries, coconut, and nuts evenly over the surface of the cake.
07 - Bake for 40-45 minutes until edges are golden brown and center is set. A toothpick inserted should come out with moist crumbs but not wet batter.
08 - Let cake cool in pan for at least 30 minutes before cutting. Serve warm or at room temperature.