When fruits are to be frozen in the cubes, fill the tray one-third full with water, then partially freeze. Add the fruit then freeze. This will hold the fruit in position. Then add water until the tray is about three-fourths full and finish freezing.
Any pure food coloring can be used to color ice cubes by adding to the water before it is poured into the tray. Be sure to use the right amount of coloring, for delicate tints are always more attractive.
Garnished cubes should be frozen slowly to prevent expansion and cloudiness.
Decorated Ice Cubes
Mint leaves, watercress, and candied fruit make very delightful decorating material for ice cubes. Simply put them on the ice cubes and add just enough water to freeze into place.
Decorated and garnished cubes should be frozen slowly, by leaving the freezer control on one of the “warmer” positions. Fast freezing causes rapid expansion which destroys the desired attractiveness
And for the best Iced Coffee:
Use cooled leftover coffee or cooled coffee made just for this purpose. Pour into ice cube tray and freeze. Add to iced coffee drink and as they melt in your coffee it will stay concentrated and delicious and not have that watery taste of most iced coffee.