01 - Preheat the oven to 350°F. Grease a 9x13-inch baking pan thoroughly with cooking spray or butter.
02 - In a large mixing bowl, combine the strawberry cake mix, eggs, vegetable oil, and water. Beat according to package directions until smooth, approximately 2 minutes. Pour the batter evenly into the prepared baking pan.
03 - In a separate bowl, beat the softened cream cheese and butter together using an electric mixer until creamy and well-combined, about 1-2 minutes. 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 evenly over the surface of the cake batter, leaving some spaces between dollops.
05 - Scatter the diced fresh strawberries and white chocolate chips over the top of the cake and cream cheese mixture. Sprinkle with shredded coconut if using.
06 - Using a butter knife or thin spatula, gently swirl the cream cheese mixture into the cake batter in a figure-eight or circular motion. Be careful not to overmix—maintain distinct marbled patterns for the earthquake effect.
07 - Bake for 40-45 minutes until the edges are set but the center remains slightly gooey. The cake should have a gentle jiggle in the middle when removed from the oven. Avoid overbaking as the molten texture is essential to this dessert.
08 - Allow the cake to cool in the pan for at least 30 minutes before slicing and serving. For cleanest cuts, refrigerate for 1-2 hours before serving, then bring to room temperature.