01 - Preheat oven to 350°F. Grease a 9x13-inch baking pan thoroughly with cooking spray or butter.
02 - In a large bowl, combine strawberry cake mix, eggs, vegetable oil, and water. Beat according to package directions until smooth, approximately 2 minutes. Pour batter evenly into prepared pan.
03 - In a separate bowl, beat softened cream cheese and butter together until creamy. Add powdered sugar and vanilla extract, continue beating until mixture is smooth and lump-free.
04 - Drop spoonfuls of cream cheese mixture randomly over the cake batter, distributing evenly across the surface.
05 - Scatter diced strawberries and white chocolate chips over the cream cheese dollops. Sprinkle shredded coconut evenly across the top if desired.
06 - Using a butter knife, gently swirl the cream cheese mixture, strawberries, and toppings into the cake batter. Make 3-4 figure-eight motions without over-mixing to maintain distinct marble patterns.
07 - Bake for 40-45 minutes until edges are set but center remains slightly gooey. The cake should still have a gentle jiggle when touched—avoid overbaking to preserve the molten texture characteristic of earthquake cake.
08 - Allow cake to cool in pan for at least 30 minutes before slicing. Serve slightly warm or at room temperature for optimal texture and flavor.