I've been trying different mixed drinks and sometimes the directions call for floating a layer of cream on the top by pouring it over the back of a spoon. Somehow my tries always end up with a rather unpleasant looking curdled mess. Any tips on how to get this to "look like the picture" ? I am using half and half because that's what we have in the fridge. Does that make a difference?
Yes, the kind of dairy product you're using makes a huge difference. Half and half doesn't have a very high fat content, so it doesn't float on top of the drink. Use heavy cream, and whip it slightly so that air bubbles provide extra lift. At work, we put the cream in a 10 ounce glass soda bottle and shake it like crazy for a few seconds before pouring.