Transfer icing to a small bowl or pitcher. If it's an icing you make on the stovetop, you can leave it right in the pan, if desired.

Place completely cooled cake on a serving plate or cake stand. Set plate or cake stand on a small turntable (Lazy Susan) if desired.

Hold bowl (or pitcher or pan) with icing over the center of one side of the cake. Begin pouring with one hand while slowly turning the plate or cake stand with the other hand. Anytime you want the icing to cascade down the sides of the cake, just slow down a bit, then continue going around the cake (see video above).

When you get back to where you started, you can stop or, if you like more icing (like we do), continue around the cake again.

While icing is still "wet" shower with sprinkles, sea salt, etc.

Allow icing to "set" for at least one hour.