Learn to taste without color. Taste without interupption and focus on pure oral and olfactory (nasal) sensations. 
 Island Sharks Flavor Wheel - The world's first non-influential and grayscale flavorwheel allowing sommeliers to process aroma and flavor on the deepest levels possible and report like a professional.
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Follow the instructions on the wheel to taste with flavor and aroma instead of being influenced by color.  The purest way to interprest 1 sense (taste) is by blocking out the others!  Use the wheel to find and name the flavors you can detect in craft chocolate.