Arrange 8 slices of bread on a cutting board and spread with Salted Caramel Snack Spread, about 1/2 tablespoon each.
Flip 4 of the slices and sprinkle with ¼ cup white chocolate chips. Top with a few mango slices and ¼ cup raspberries. Flip remaining 4 bread slices and spread each with 1/2 tablespoon Salted Caramel Snack Spread. Place on top of the sandwiches and gently press down to adhere.
Heat a large skillet over medium-low heat. Carefully transfer a sandwich to the skillet, cover and cook until bread is golden and chocolate is starting to melt, about 5 minutes. Flip the sandwich, re-cover the skillet and cook another 4-5 minutes, until white chocolate is fully melted and bread is golden brown. Transfer to a plate and serve hot. Repeat with remaining 3 sandwiches.