Crafting the Perfect Espresso-Style Shot with AeroPress Prismo

Elevating the AeroPress Experience

The

AeroPress
is a staple for home brewers, but it traditionally lacks the pressure required for true espresso. Enter the
Prismo
 by
Fellow
. This pressure-actuated attachment replaces the standard filter cap, featuring a reusable stainless steel filter and a specialized valve that remains sealed until you apply manual pressure. This guide transforms your standard immersion brewer into a powerhouse capable of pulling a dense, espresso-like shot with genuine crema.

Essential Tools and Ratios

Success starts with high-quality gear and precision. You need a gooseneck kettle—ideally the

Stagg EKG
—to control your pour, a digital scale, and fresh coffee.

  • Coffee: 20g of finely ground beans (darker roasts or espresso blends perform best).
  • Water: 50g of water, heated to a full boil.
  • The Hardware: An
    AeroPress
     fitted with the
    Prismo
     attachment.

The Step-by-Step Technique

  1. Prep the Gear: Attach the
    Prismo
     to the
    AeroPress
    . Place it directly on your cup; the valve prevents leakage, so no inverted method is necessary.
  2. Add Coffee: Dose 20g of coffee. Freshness is non-negotiable—beans should be less than two weeks from roast.
  3. The Controlled Pour: Start your timer and slowly pour 50g of boiling water. The small water volume requires maximum heat to ensure proper extraction.
  4. Agitation: Stir vigorously for at least 20 seconds. Since we cannot match the 9 bars of a commercial machine, mechanical agitation must compensate to build body.
  5. The Press: Apply firm, consistent pressure. You are creating a puck of coffee against the metal filter, forcing the concentrate through the valve to create that signature mouthfeel.

Maintenance and Troubleshooting

To clean, pull the plunger back slightly before unscrewing the

Prismo
. This creates a vacuum that lifts the puck, making it easy to pop out and rinse. If your shot tastes weak, increase your stirring time. If it feels thin, ensure your water is at a rolling boil and your coffee grind is fine enough to provide sufficient back-pressure during the plunge.

2 min read