If tasters knew whose breads they were evaluating, that knowledge could sway their perceptions. To avoid any subconscious bias, the bread samples were not identified during the tastings.
FLAVOR MEMORIES
Each of us has a unique flavor memory. We know what a lot of foods taste like without having them physically present. Our sensory wiring is so strong that, if you read the word coffee, your memory can conjure its bitterness, its earthy notes, and even its weight on your tongue.
Our ability to recall the flavors and texture of bread is much less developed, primarily because we don’t have a shared vocabulary to rely on. Once you learn words to describe those flavors and textures, you can build your own bank of flavor memories. As you develop your palate, you’ll enjoy bread on a new level.
To harvest that innate sensory power when working with a large group of tasters, the key is to establish a scale. On such a continuum, ranked from low to high, three different samples can be ranked, thereby creating a shared reference scale for the individual tasters — a process called palate calibration.
Take bitter, a basic taste present in dark-baked breads of the bien cuit (well-baked) style. Not everyone has the same tolerance for bitter. If you make a habit of eating things like kale, black coffee, and unsweetened chocolate, your idea of bitter is different from someone who takes milk and sugar in coffee, eats milk chocolate, or prefers English peas as a green vegetable.
Below is the scale for bitter that we used. Imagine a horizontal line whose left (very low) anchor is raw peanut and whose right anchor (very high) is tonic water. In the center is dark chocolate.
In one of the earlier exercises, the audience chewed the dark-baked crust of one sample. Using their mutual understanding of the bitter scale, the majority of the audience rated the particular sample’s bitterness intensity as medium-low.
Glenn Roberts said, “I was astounded by how many of the tasters agreed with ranking the bread in roughly the same place on the scale. A group of strangers in a room, and here we were agreeing on our sensory perception about a slice of bread.”