Prepare Pistachio Syrup: Blend shelled pistachios with sugar and a little water, then strain to make a smooth syrup.
Brew Coffee: Prepare a shot of espresso or strong coffee.
Steam Milk: Heat and froth milk until creamy and airy.
Mix Latte: In a cup, add pistachio syrup, pour espresso, and top with steamed milk. Stir gently.
Garnish: Sprinkle crushed pistachios or a pinch of cocoa powder on top. Serve immediately.