First up was 7 minute frosting. I halved the recipe so I wouldn't end up with tons leftover. This frosting is made of egg whites and a cooked sugar syrup. It wasn't too hard, it just took a while to get the sugar syrup up to the right temperature.
Second was traditional American buttercream. This is the easiest to make, with only butter, powdered sugar, and vanilla.
Last was swiss merengue buttercream. This is the trickiest to make, although it was a lot easier than in the past. This is made with a warmed egg white and sugar mix, which is beaten to stiff peaks, and then butter (4 sticks!) is added in gradually. I usually have trouble with this frosting, but it was perfect this time. After adding the butter, it looks all goopy and wrong, but you just beat it like crazy for a few minutes and it's perfectly fluffy and smooth.
Anyhoo, took these to be tasted this morning. The 7 minute frosting had flopped overnight, so I knew that wasn't going to get good reviews. I think most people like the american buttercream, which is good, since it's easier and cheaper to make than the swiss merengue buttercream. I'm glad to know that I can produce any of these frostings rather easily.