Prep the pan: Heat the oven to 350°F (175°C). Grease a 9x13-inch baking pan. Sprinkle the coconut and nuts evenly over the bottom of the pan.
Mix the cake: Prepare the strawberry cake batter according to the box directions.
Fold in the sliced strawberries and white chocolate chips, if using.
Make the cream cheese mixture: In a bowl, beat softened cream cheese, melted butter, powdered sugar, vanilla, and a pinch of salt until smooth and glossy.
Assemble: Pour the cake batter over the coconut and nuts. Dollop the cream cheese mixture over the top in large spoonfuls. Don’t spread perfectly—those uneven pockets create the “earthquake” effect.
Bake: Bake 35–45 minutes.
The top should be golden with crackly swirls, and the center should jiggle slightly but not be soupy. A toothpick inserted in several spots should come out with moist crumbs, not raw batter.
Cool and set: Let the cake cool at least 30–45 minutes so the gooey layers can set. Serve warm or at room temperature.
Optional finish: Dust with a little powdered sugar or top with extra sliced berries before serving.