Coffee

: Results in "grassy," hay-like, or papery flavors if the bean isn't roasted thoroughly to its center.

: The best way to learn is by comparison. Brew four different beans using the same method and look for differences in sweetness, acidity, bitterness, and mouthfeel. coffee

: Can lead to a loss of acidity and floral notes, replaced by charcoal, toast, or "ashy" bitterness. : Results in "grassy," hay-like, or papery flavors