I saw this recipe for a banana and pudding smoothie, it said to use JELL-O instant, but i have JELL-O cook and serve, does it matter which if i use cook and serve? Also the package for the cook and serve says that it can be chilled so i was going to make it now, but it said that the pudding gets thicker as its cold, does that mean it would drastically change the texture of the smoothie?