Step 1: Prepare the Glass and Rim
Chill your coupe or martini glass in the freezer for at least 15 minutes. On a small saucer, mix together the sugar, cocoa powder, and sea salt for the rim until uniform. On another saucer, add a small pool of honey or light corn syrup. Take the chilled glass and carefully dip the rim first into the syrup, then into the sugar-cocoa-salt mixture, twisting gently to create an even, flavorful crust. Set the glass aside.

Step 2: Combine Ingredients in the Shaker
Fill a cocktail shaker about halfway with fresh ice cubes. To the shaker, add the vodka, dark crème de cacao, salted caramel syrup, half-and-half, and the ½ teaspoon of cocoa powder.

Step 3: Shake with Conviction
Secure the lid on your shaker tightly. Shake vigorously and decisively for a full 15-20 seconds. This step is non-negotiable—it chills the drink, dilutes it to the perfect strength, fully incorporates the cocoa powder, and emulsifies the cream to create a luxuriously smooth and slightly frothy texture. The shaker should feel painfully cold in your hands.

Step 4: Strain and Pour
Remove your prepared, rimmed glass from the freezer. Using a Hawthorne strainer (or a fine mesh strainer if using a Boston shaker), strain the shaken cocktail into the glass. This ensures a perfectly smooth pour, free of any ice chips or undissolved cocoa.

Step 5: Add the Final Garnishes
Immediately, while the frothy top is still present, add your chosen garnishes. A light drizzle of caramel sauce on the surface of the drink is classic. Follow with a few dark chocolate shavings and a single, artful pinch of flaky sea salt right in the center.

Step 6: Serve and Savor
Serve the martini immediately, while it is at its peak frostiness. Encourage the drinker to first appreciate the aroma from the rim, then take a sip through the frothy top for the complete, layered experience.