How Do You Decide Which Coffee Formats to Focus On

I’m running a small coffee shop and lately my customers have become a bit unpredictable. One week everyone wants espresso-based drinks, the next week it’s all cold brew — but almost nobody buys regular brewed coffee anymore. It’s confusing because I invest in good beans, but I’m not sure which formats I should prioritize to keep both customers and margins happy. For those of you in the industry or with experience, what’s your go-to lineup for coffee selections? Is it better to diversify and offer a wider mix, or narrow down the menu to what’s trending and selling best? Would love any advice on best-selling combos or smart ways to structure the menu.