Preheat waffle iron to medium setting. On most models the indicator light will go out when propoer temperature is reached. Melt butter in a saucepan over low heat. Remove from heat. Blend cocoa into butter with a wooden spoon. Stir in sugar, beaten eggs and water. Add flour and salt; beat well. If you choose to add nuts, do so now and mix thoroughly.

Into each section of the preheated waffle iron, drop one well-rounded teaspoon of batter. Close lid and bake about 1 1/2 minutes. The brownies are done if they do not stick to the top of the waffle iron. Use the tip of a wooden skewer to remove brownies easily. Let cool on racks. Sprinkle with confectioner's sugar (recommended but optional).
Makes 2 1/2 dozen.