Wash and dry the lemon well. Using a peeler or sharp knife, cut 2 wide strips of lemon peel, one for each drink. Try to take mostly the yellow zest with only a very thin amount of white pith underneath. If using the torch, briefly warm each peel for 1–2 seconds over a low flame or with a small kitchen torch, just until the surface looks glossy and highly aromatic. Do not blacken or burn it. The peel should smell intensely lemony and slightly warm, not scorched or bitter. Gentle heat helps release the citrus oils more aggressively, which gives the finished drink a deeper, more fragrant lemon note. Taking mostly yellow zest rather than a thick strip including pith matters directly for flavour — the pith carries most of a lemon peel's bitterness, and minimising it keeps the expressed oils fragrant rather than sharp.

Brew 120ml espresso total, equal to 4 standard 30ml shots. The espresso should taste clean, balanced, and aromatic, not harsh or over-extracted. Because the drink is so simple, the espresso quality is very noticeable. Build the drinks soon after brewing so the espresso keeps its freshness, but give it 30–60 seconds to settle if it is extremely hot. With so few ingredients in this drink, any flaw in the espresso itself has nowhere to hide — this simplicity is exactly why brewing quality matters more here than in a heavily flavoured or milk-based drink.

Fill 2 tall highball glasses generously with ice. Divide the cold filtered water evenly between the glasses, 120ml per glass. The glasses should be well packed with ice so the drink chills immediately and stays crisp. Starting with cold water rather than room-temperature water keeps the Americano bright and refreshing instead of diluted and flat. Building the water and ice base before the espresso ever arrives sets up the same clean separation and controlled dilution that governs every espresso-over-ice drink in this style — the water is measured precisely rather than left to the ice's slow melt, which keeps the final strength consistent and predictable.

Pour 60ml espresso into each glass over the ice and water. The drink should take on a pale amber-brown colour — light, clean, and almost translucent when held to the light. That lighter colour is part of the classic character of an iced Americano. Pouring the espresso last, over the already-built ice-and-water base, is what keeps the drink's colour and dilution properly controlled — espresso added before the water would concentrate unevenly and lose the light, translucent character this specific drink is defined by.

Hold one strip of lemon peel, yellow side facing down toward the drink, and twist it firmly over the surface of the Americano to release the aromatic oils. Rub the peel lightly around the rim of the glass, then drop it into the drink. Repeat with the second glass. Stir each drink once or twice and serve immediately. The finished drink should smell of fresh espresso with a subtle citrus top note. The lemon should lift and perfume the Americano, not turn it sour like lemonade. Twisting the peel firmly, yellow side down, aims the expressed oil spray directly onto the drink's surface where it does the most aromatic work — twisting it away from the glass, or too gently, wastes much of that citrus oil into the air instead of into the cup.