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, oil, and water. Mix with electric mixer on medium speed for 2 minutes until well blended and smooth. Spread batter evenly in prepared baking dish.
03 - In a separate bowl, beat softened cream cheese and butter with electric mixer until smooth and creamy, about 2 minutes. Add powdered sugar and vanilla extract; continue beating until fully combined and fluffy, scraping down sides as needed.
04 - Drop spoonfuls of cream cheese mixture randomly over the surface of the cake batter, leaving some areas visible.
05 - Use a butter knife or skewer to gently swirl the cream cheese mixture through the cake batter. Make figure-eight motions, being careful not to over-mix—you want distinct marbled pockets.
06 - Sprinkle white chocolate chips, chopped strawberries, coconut, and nuts evenly over the entire surface, pressing lightly into the batter.
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. Do not overbake.
08 - Cool in pan for at least 30 minutes before serving. Serve warm or at room temperature. Store leftovers covered at room temperature for up to 3 days.