01 - Preheat the oven to 350°F. Grease a 9x13-inch baking dish thoroughly to prevent sticking.
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 and well blended. Pour the batter evenly into the prepared baking dish, spreading to corners.
03 - In a separate bowl, beat the softened cream cheese and butter together until creamy and smooth. Add the powdered sugar and vanilla extract. Continue beating until the mixture is fluffy and no lumps remain.
04 - Drop spoonfuls of the cream cheese mixture randomly over the surface of the cake batter. Use a knife or skewer to gently swirl and marble the cream cheese through the cake batter, being careful not to overmix.
05 - Sprinkle the diced fresh strawberries, white chocolate chips, and shredded coconut (if using) evenly over the top of the swirled batter.
06 - Bake for 40 to 45 minutes. The cake is done when the edges are set but the center remains slightly gooey, creating the signature earthquake appearance.
07 - Allow the cake to cool in the pan for at least 30 minutes before slicing. Serve warm or at room temperature for the best texture and flavor.