Brew Espresso: Brew two shots of espresso or a small, strong cup of coffee using a French press or Moka pot for intensity.
Mix Sweetener: While hot, mix the brown sugar into the espresso until fully dissolved, creating a smooth syrup.
Prepare Shaker: Fill a cocktail shaker or jar halfway with ice cubes.
Combine and Shake: Add the sweetened espresso and oatmilk to the shaker. Shake vigorously for 15-30 seconds until the mixture is frothy and cold.
Serve: Strain into a glass filled with fresh ice and milk. Optionally, sprinkle cinnamon on top for added flavor.
