How to Use an Espresso Coffee Machine | First Shots, Right Way

Learning how to use an espresso coffee machine comes down to a short sequence: heat the machine, grind fine, dose, tamp, brew, and clean up. Skip any step and the shot turns sour or bitter. The good news is the process stays the same across semi-automatic and fully automatic machines, so the skill carries over if you upgrade later. Before buying a machine, it’s worth seeing what barista-grade options exist in our tested roundup of the best espresso coffee machines this year.

Getting Ready: Fill, Heat, and Prime

Start with fresh cold water. Fill the tank but don’t overfill it — an overfilled reservoir can leak. Switch the machine on and give it time to heat fully; skipping the warm-up is the most common cause of under-extracted, sour shots. Most machines need 10–15 minutes to reach brewing temperature.

If the machine is new or hasn’t been used in a while, check the manual for a priming step. Some machines require running a blank shot of water through the group head before first use. This flushes the lines and warms the brew head, which keeps your shot temperature stable.

Grind, Dose, and Tamp

Espresso needs a fine grind — finer than table salt but not quite powder. Most home machines include a built-in grinder with an espresso setting. If you grind too coarse, water rushes through and the shot comes out weak; too fine and it chokes.

Dose the portafilter with the correct basket fitted. A double shot typically uses 18–20 grams of coffee. Level the grounds, then tamp with even, firm pressure. An uneven tamp causes channeling, where water finds a weak path through the puck and the shot extracts unevenly.

Brewing the Shot

Lock the portafilter into the group head and place a preheated cup underneath. Start the brew and watch the timer. A proper shot runs 25–30 seconds and produces about 2 ounces for a double. The espresso should pour like warm honey — thin streams that fatten into a golden crema.

If it runs fast, grind finer next time. If it drips slowly, grind coarser. Change one variable at a time so you know what fixed it.

For milk drinks, steam after pulling the shot, not before. Purge the steam wand briefly, submerge it in cold milk, and steam until the pitcher feels warm to the touch, around 140–150°F. Purge again when done and wipe the wand immediately — dried milk is the main cause of clogged wands.

Cleaning Up After the Shot

Knock out the spent puck, rinse the portafilter and basket under hot water, and wipe the group head with a cloth. Give the steam wand one more purge and a wipe. Leaving coffee in the portafilter while you steam milk lets it dry onto the metal and affects the next shot’s taste.

KitchenAid’s guide to using an espresso machine follows this exact order: fill the tank, add beans, select the beverage, and press start. Breville’s Barista Express tutorial walks through the same first-time setup for that specific model. The Perfect Daily Grind’s 14-step espresso guide covers the barista-level version of this workflow in more detail.

Stovetop moka pots are a different beast — they brew with steam pressure from a bottom chamber and need a coarser grind. If that’s what you own, follow the pot’s own instructions rather than the portafilter workflow above.

FAQs

How much coffee goes in a single vs. double shot?

A single shot uses roughly 7–9 grams of coffee, while a double takes 18–20 grams. The basket size determines the dose — always use the basket that matches the shot you want. Overdosing a single basket or underdosing a double will throw off extraction time and taste.

Why is my espresso bitter or sour?

Bitter espresso usually means over-extraction: the grind is too fine, the dose too high, or the shot ran too long. Sour espresso points to under-extraction: grind too coarse, too little coffee, or a skipped warm-up. Adjust one variable at a time and taste the difference.

Do I need to run water through the machine before brewing?

Most machines benefit from a blank shot — running hot water through the group head without coffee — to heat the brew head and flush stale water. New machines often require a full priming cycle per the manual. Check your model’s instructions, since this step varies