Might want to check your math there. At $20/lb, zero waste (!!), 18g of coffee is $0.80/shot. Add in 10-15% waste (accurately predicting exact supply of beans is almost impossible, plus dialing in, mistakes, and training) and a more standard 22g basket, you get $1.12 per drink.
Aiming for 25% COGS, that pushes up the price of a cup to $4.50 before milk, syrups, cups, etc. If the cost of coffee doubled, you'd be looking at the cost of coffee only being 38% COGS for a $6 drink. That kind of increase is not only going to completely remove all margins, but likely put you in the red per drink served.
Aiming for 25% COGS, that pushes up the price of a cup to $4.50 before milk, syrups, cups, etc. If the cost of coffee doubled, you'd be looking at the cost of coffee only being 38% COGS for a $6 drink. That kind of increase is not only going to completely remove all margins, but likely put you in the red per drink served.