01 -
Peel and slice the banana into coins. Spread them in a single layer on a parchment-lined plate and freeze for at least 2 hours or overnight. You can keep a bag of frozen banana slices in the freezer all week so you are always ready.
02 -
Pour the milk into the blender first, then add the ice cubes, frozen blueberries, and frozen banana coins. Add the honey, vanilla, and salt last. Starting with liquid at the bottom keeps the blades from stalling when you turn it on.
03 -
Blend on the highest setting for 45 to 60 seconds until completely smooth, thick, and uniformly purple. If the blender stalls, stop it, add one tablespoon of milk, and pulse a few times before going back to high speed.
04 -
Spoon out a small taste. If the blueberries made it tart, add a bit more honey. If it is too thick to flow easily, add milk a splash at a time. Blend for 10 more seconds after any adjustment.
05 -
Divide the frappuccino between two tall glasses. Spoon or pipe whipped cream on top in a generous swirl. Scatter a few fresh blueberries over the cream and rest a banana slice on the rim if you like. Serve immediately with a wide straw.