01 - Preheat oven to 350°F. Grease a 9x13-inch baking pan thoroughly with cooking spray or butter.
02 - Combine the strawberry cake mix, eggs, vegetable oil, and water in a large bowl. Beat until completely smooth and well incorporated, about 2 minutes. Pour the batter evenly into the prepared baking pan.
03 - In a separate medium bowl, beat the softened cream cheese and butter together until creamy. Gradually add the powdered sugar and vanilla extract, continuing to beat until the mixture is smooth and spreadable.
04 - Drop spoonfuls of the cream cheese mixture randomly over the surface of the cake batter. Scatter the chopped strawberries and white chocolate chips evenly across the top. Sprinkle with shredded coconut if desired.
05 - Using a butter knife or skewer, gently swirl through the layers to create a marbled earthquake effect. Move the knife in a figure-8 or circular motion, being careful not to overmix. The goal is distinct swirls rather than a uniform blend.
06 - Bake for 40-45 minutes until the center is just set and a toothpick inserted comes out with a few moist crumbs. The edges should be lightly golden and the surface should appear slightly cracked.
07 - Allow the cake to cool completely in the pan, about 1-2 hours. The cake will continue to set as it cools. Slice into squares and serve at room temperature or chilled.