keurig k-mini plus coffee maker, single serve k-cup pod coffee brewer, 6 to 12 oz. brew size

too coarse a grind, too little coffee, or insufficiently tamping the grounds before brewing can all lead to inadequate pressure for a proper brew. it is important to note that the amount of espresso extracted will vary depending on the grind size and amount and reprogramming may be needed when the size and amount are adjusted..syi