Grain Flavor Profiles

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Grain attributes

Malting: Barley is normally malted. Other grains, unless specifically stated, are unmalted. Unmalted grains have a different flavor than malted. Unmalted grains do not have available enzymes for conversion.
Diastatic power (DP): Measures the enzymatic power of a grain. Measured in Degree Lintner.
Color: The color of a grain is described on the Lovibond scale after kilning. Kilning causes the Maillard Reaction and adds complexity to the flavor of the grain. As a negative kilning reduces the DP and available usable sugars. For distilling the color of a grain doesn't affect the color of the end product. Measured in SRM with the larger the number the darker the color.
Starch content: The prize, this is what is turned into fermentable sugars to feed the yeast to create alcohol.
Flaked: Flaked grains are Gelatinized by the process of flaking. They also have no DP for conversion. This makes using flakes grains convenient as they don't need to be mashed. The downside is that they can make a huge mess and cannot be lautered easily.
Protein Content: For distilling protein content isn't meaningful other than as a nutrient for yeast.

Barley

For brewing and distilling, barley is the most common and modified grain. Heavy flavors to use as the base for most whiskies.

2 Row: Malted 2 row barley is considered a base malt. It can comprise 100% of a grain bill for a simple single malt whiskey. It is high in starches and DP, low in color (L).
6 Row: Lower sugar levels but higher conversion enzymes make this popular for distillers.

Oats

Used to create smoothness. Counteracts hard water.

Maize or Corn

For pure sugar content and cost corn can't be beat. Adds sweetness and lightens up flavor.

Wheat

Wheat adds a smooth gentle flavor to a whiskey. Added as minor part of a grain bill it makes a partner to other grains. Generally not used a majority of a grain bill.

Rye

Rye is a very strongly flavored grain with spicy and grass like notes. While it can be used as 100% of a grain bill, it normally is an accent to bourbon and other whiskeys. A bread grain used to add a dry rye flavor to beers. Hard to lauter because of its lack of husk material, so the use of rice hulls is recommended.

Spelt

Needs more research.

Millet

Needs more research.

Rice

Needs more research.

Quinoa

Needs more research.

Triticale

Needs more research.

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