How long does it take to ';completely cool'; a simple 2 layer cake?

On a wire rack at least an hour.





Depending on the icing or glaze you want to use depends on when you frost it or glaze it.





Some glazes or frosting you may want to put on while the cake is warm, some when it is room temp.How long does it take to ';completely cool'; a simple 2 layer cake?
On a wire rack not put together about an hour.How long does it take to ';completely cool'; a simple 2 layer cake?
I would generally let it sit at least an hour.