01 - Preheat oven to 350°F. Generously grease a 9x13-inch baking pan with cooking spray or butter.
02 - In a large bowl, combine the strawberry cake mix, eggs, vegetable oil, and water. Beat with an electric mixer or whisk until completely smooth, about 2 minutes. Pour the batter evenly into the prepared pan.
03 - In a separate bowl, beat together the cream cheese, butter, powdered sugar, and vanilla extract until creamy and smooth, about 3 minutes. The mixture should be thick but spreadable.
04 - Drop spoonfuls of the cream cheese mixture evenly over the cake batter, leaving some spaces visible. Scatter the chopped strawberries and white chocolate chips over the top. Sprinkle with shredded coconut if desired.
05 - Using a butter knife or skewer, gently swirl the cream cheese mixture, cake batter, and toppings together in a circular or figure-eight motion. Create a marbled, earthquake effect without completely mixing the layers.
06 - Bake for 40 to 45 minutes, until the center is just set and a toothpick inserted comes out with a few moist crumbs. The edges should be lightly golden.
07 - Cool completely in the pan on a wire rack, about 1 hour. Slice into squares and serve chilled or at room temperature.