01 - Brew strong coffee and distribute evenly between two heatproof glasses or mugs.
02 - Add 1 tablespoon brown sugar to each glass; stir continuously until fully dissolved.
03 - In a chilled mixing bowl, combine heavy cream, powdered sugar, and vanilla extract. Whip using hand mixer or whisk until soft peaks form.
04 - Gently spoon whipped cream over the back of a spoon onto hot coffee surface, creating a distinct floating layer without stirring.
05 - Dust top with cocoa powder or nutmeg if desired. Serve immediately while hot.