Preheat the oven to 350°F (175°C). Grease and flour a 9×13 inch baking pan.
In a mixing bowl, combine cake mix, eggs, water, and oil. Beat until smooth. Pour batter into the prepared pan.
Bake the base layer for 30–35 minutes, or until a toothpick inserted in the center comes out clean.
In another bowl, beat softened cream cheese and melted butter until smooth. Gradually add confectioners’ sugar, then mix in vanilla and salt.
Remove cake from oven, sprinkle diced strawberries and white chocolate chips over the top. Dollop cream cheese mixture across the surface.
Return to the oven and bake another 15–20 minutes, until cream cheese is slightly golden.
Let the cake rest for 30 minutes. Garnish with extra strawberries or serve with ice cream.
