Step 1: Prepare the Glass
This step is crucial for the full “cinnamon roll” experience. Take a small plate and spread the cinnamon sugar on it. Take your chosen serving glass and lightly moisten the rim. You can do this by dipping your finger in RumChata or Irish cream and running it around the outer edge, or by gently dipping the rim into a shallow dish of the liqueur. Roll the moistened rim in the cinnamon sugar until it is evenly and beautifully coated. Set the prepared glass aside.

Step 2: Combine the Liquids
Fill your cocktail shaker about two-thirds full with fresh, high-quality ice. Using your jigger for accuracy, pour the 1 ½ ounces of RumChata, 1 ounce of cinnamon whiskey, ½ ounce of Irish cream, and ½ ounce of vanilla vodka directly over the ice in the shaker.

Step 3: The Vigorous Shake
Securely fasten the lid on your cocktail shaker. Shake vigorously for 12-15 seconds. You are not just chilling the ingredients; you are diluting them slightly with melted ice to perfect the mouthfeel, and most importantly, you are aerating the dairy-based liqueurs to create a rich, frothy, and perfectly integrated texture.

Step 4: Strain and Serve
Using your strainer, pour the shaken cocktail into your prepared glass. If you are serving it “up” (without ice), strain it into a coupe or martini glass. If you prefer it on the rocks, strain it into an Old Fashioned glass filled with fresh, large ice cubes to prevent over-dilution.

Step 5: The Final Garnish
For the ultimate finishing touch, gently place a cinnamon stick into the drink as a stirrer and aromatic garnish. For peak indulgence, top the drink with a small, fresh dollop of whipped cream and a light dusting of extra cinnamon sugar.