Estimations for how long you need to let royal icing dry vary, but you should typically let it sit for at least this long.

2. Place remaining 2/3 cup granulated sugar in a medium stainless steel skillet. Cook over medium, without stirring, until sugar starts to melt and begins to turn slightly golden, 4 to 6 minutes. Cook ...

How To Make Caramel Frosting I personally don't like following a lot of rules when I cook or bake, but in the case of Caramel Frosting, sticking to the rules is pretty much crucial.