Product details
Proportion of total calories contributed by protein, carbs and fat.
Wafers are formed from flour and water dispersions (batter) with small amounts of fat, sugar, salt and sodium bicarbonate, which are mixed and then confined in preheated moulds3. Yeast may be used in place or in addition to sodium bicarbonate.
The reason for this energy density is sugar wafers' high fat content. Any olive oil-drinking, peanut butter-spooning thru-hiker knows that fat is the most effective way to get calories on trail.
The term 'wafer' usually refers to a thin crisp type of biscuit (see Figs 30.1 and 30.2). In this chapter we shall be considering only wafers which are biscuits baked from batters between heavy hot metal plates.