I hear all the time about people painting their cake layers with simple syrup before spreading the frosting on. Is this supposed to make the cake more moist?
it adds some flavor(if you add any) and helps make it moist.. some people can over bake a cake.. that is when simple syrup helps. others just like to use it on all their cakes.. hth
Just like Icer101 said.
As well as using it to add moisture I use it under my fondant. I cover my cakes in ganache and when it's really smooth the fondant doesn't have anything to adhere to without either a spray of water or a brush with a jam syrup (equal parts apricot jam and boiling water, stirred then sieved. I also add a bit of cointreau liqueur for some flavour!)
It's in no way necessary to use syrup on your cakes but I find it helps keep them (especially cupcakes) moist.
You can really tell a difference when you use a moistening syrup and when you don't. As everyone said, it makes the cake really moist and also makes the cake more flavorful. I don't make cakes unless I put a moistening syrup on them!
I do it for flavor for chocolate WASC - I make a simple syrup with coffee instead of water - adds incredible flavor.
i use syrups on all my cakes and it really makes a difference to moisture and flavour