"Ground espresso" refers to coffee beans that have been turned into a fine powder. It is used to make espresso, a strong type of coffee. Full definition
This might be a silly question, but do you know if it's all right to use ground espresso beans instead of instant espresso powder? (smittenkitchen.com)
This may be a silly question, but is espresso powder just very finely ground espresso beans, or is it more akin to instant coffee? (101cookbooks.com)