Brew the espresso or strong coffee first, then let it cool completely. The coffee must be cold before blending — warm coffee melts the ice immediately, thins the smoothie, and dulls the thick, creamy texture. That immediate melting isn't a minor issue here: it's the single biggest point of failure for this smoothie's body, since every other step is built around ice and frozen banana doing real structural work that warm liquid undoes in seconds.

Add the milk, chilled espresso, Greek yogurt, banana, honey or maple syrup, vanilla, salt, and about half of the ice to the blender. Blend on high until mostly smooth. Adding the liquid first helps the blender pull the banana down efficiently and avoids pockets of unblended fruit. That sequencing matters because banana, especially frozen, is dense enough to simply sit on top of a dry or under-liquid blend, and the blades need real liquid moving beneath it to pull it properly into the mix.

Add the remaining ice and blend again until the smoothie is completely smooth, thick, and lightly frothy. Check the consistency: if it's too thick, add a small splash of milk; if it's too thin, add a little more ice or a few more pieces of frozen banana. The finished smoothie should be thick and glossy, but still pourable, with a lightly airy top. Reaching for frozen banana rather than plain ice alone when the texture runs thin keeps the drink's flavour concentrated instead of diluted by meltwater that carries no banana or coffee character of its own.

Taste the smoothie before serving and adjust as needed: more honey or maple syrup if the coffee tastes too strong or bitter, a little more espresso for a more pronounced coffee note, or a splash more vanilla for a rounder, café-style flavour. Banana sweetness varies a lot — very ripe bananas reduce the need for extra sweetener and create a smoother texture. That variability is exactly why tasting happens at this stage rather than earlier, since the right amount of sweetener here depends entirely on how ripe the bananas already blended in actually were.

Pour into 4 glasses, about 250ml each. Top each serving with banana slices, a few coffee beans, and a very light dusting of cocoa powder, then serve immediately. That immediate serving matters here just as it does with any ice-thickened blend — the smoothie loses some of its froth and begins thickening further within minutes, so the glossy, lightly airy top built over the previous steps is genuinely at its best the moment it's poured.