You can program the Barista Express according to your desired espresso shots. Here’s a quick guide you can follow. To program a single espresso, you should: 1) Press the PROGRAM button once. You’ll hear a beep once and see the Program button’s light flashes. It prompts you that the machine is currently in programming mode. 2) Push the 1 CUP button to begin your single espresso extraction. Once you reach the desired volume of espresso, press the 1 CUP button again. When you hear the beep twice, it means that it’s ready to pour another single espresso shot. To program a double espresso, you should: 1) Press the PROGRAM button once. You’ll hear a beep and see the Program Button's light flash, which prompts you that the machine is in programming mode. 2) Push the 2 CUP button to begin your double espresso extraction. Once you reach the desired volume of espresso, push it again and when you hear the beep twice, know that it's ready to pour another double-shot!