Raspberry Shortcake Sheet Cake

Name: Raspberry Shortcake Sheet Cake
Prep time: 30 min
Cook time: 15 min
Total time: 45 min
Cuisine: American
Ingredients: 15.25 oz box white cake mix (*plus ingredients to make cake listed below -- measurements may vary by brand*); 1 cup water; ½ cup oil ((canola/vegetable)); 3 large eggs; 8 oz block cream cheese; 4 Tbsp butter; ½ cup powdered sugar; 8 oz tub Cool Whip* ((whipped topping) ); 4.75 oz box Raspberry Danish Dessert ((see photo in post for reference; find in aisle with Jell-O/gelatin dessert)); 1 ¾ cup cold water; 12 oz frozen raspberries ((may use fresh as well; about 2 1/2 to 3 cups))