In terms of the quality of the product, Starbucks’ primary Decaf Metcalf Starbucks shirt goal is consistency. Their methods of roasting and brewing are highly designed so that every cup tastes the same, and they are very good at it. The roast used for their espresso is fairly dark (some would say burned). What a dark roast does for them is to reduce variations present in coffee beans from harvest to harvest and region to region. It’s not a perfect law, but a good rule of thumb is that in lighter roasts, you taste the region and in darker roasts, you taste the roast. I think a great way to differentiate your shop from Starbucks is to offer an espresso that is more of a medium roast. Sometimes this is called
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a city or full city roast. Honestly, what name to call a specific Decaf Metcalf Starbucks shirt roast changes by country and region, but definitely study the Northern Italian style of espresso. If you can pull it off (and train others to do the same) what you have is another way to contrast yourself from Starbucks, which is relying on fully automatic espresso machines. Using a quality semi-automatic machine (Using a fully manual machine might be a selling point, but frankly, I have no experience with them) and grinder is essential. A La Marzocco or Synesso 3 group machine will easily set you back 10 grand or more, but they will ensure that you have the tools to make a quality product.