About 1-3/4 cups of confectioners' sugar.

Put the cocoa in a small saucepan; add the cold water and stir until
perfectly smooth; then the hot water, and cook for one or two minutes,
add vanilla and a speck of salt, then stir in enough sugar to make it
stiff enough to spread nicely. Beat until smooth and glossy and free
from lumps.

If too thick, add a little cold water. If not thick enough, add a little
sugar. Never make a frosting so stiff that it will have to be made
smooth with a wet knife. It is better to let it run to the sides of the
cake. For frosting sides of the cake, make a little stiffer.

This frosting never cracks as an egg frosting, but is hard enough to cut
nicely.


COCOA SAUCE

2 tablespoonfuls of butter,
1 cup of boiling water,
2 tablespoonfuls of flour,
4 tablespoonfuls of sugar,
4 teaspoonfuls of Baker's Cocoa,
1 teaspoonful of vanilla.

Melt the butter in the saucepan; mix the flour and cocoa together and
stir into the butter; add gradually the hot water, stirring and beating
each time; cook until it thickens. Just before serving, add the sugar,
vanilla and a pinch of salt, if necessary.