Prepare the Matcha:

1. Sift the matcha powder into a small bowl.
2. Add hot water and whisk vigorously in a zig-zag motion until frothy and fully dissolved.

Make the Cold Foam:

1. In a small frothing pitcher or jar, combine milk, olive oil, sweetener, sea salt, and vanilla (if using).
2. Froth using a handheld frother or shake vigorously in a sealed jar until thick and foamy.

Assemble the Drink:

1. Fill a glass with ice and pour in your milk of choice.
2. Add the whisked matcha over the milk.
3. Spoon or pour the olive oil cold foam on top.