pkgs Birthday Cake or Golden Oreo Cookies (14.03 oz), divided • tablespoons unsalted butter • tablespoons cold water • teaspoon gelatin • ounces white chocolate • cup plus 2 tablespoons heavy whipping cream, divided • tablespoons vanilla cake mix • teaspoon vanilla extract • ounces cream cheese, softened • tablespoons cold water • teaspoon gelatin • cup heavy whipping cream •