01 - Place raw pistachios in a bowl and cover with cold water. Leave to soak overnight or at least 6 hours. Drain and rinse thoroughly.
02 - Transfer soaked pistachios to a blender. Add filtered water, vanilla extract, maple syrup or honey, and a pinch of sea salt. Blend until completely smooth.
03 - Strain the blended mixture through a nut milk bag or fine mesh sieve set over a pitcher. Discard the solids or reserve for baking applications.
04 - Pour pistachio milk into a saucepan and gently heat over medium, whisking until hot but not boiling. Adjust sweetness if desired.
05 - Brew two shots espresso or prepare strong coffee using an espresso machine or coffee maker.
06 - Divide hot pistachio milk between two cups, reserving froth. Add espresso to each cup and stir gently to blend.
07 - Spoon reserved froth on top and sprinkle with crushed pistachios if desired. Serve immediately.