Step 1: In a large blender, combine the cream of coconut, unsweetened coconut milk, evaporated milk, sweetened condensed milk, rum (if using), ground cinnamon, ground nutmeg, vanilla extract, and a pinch of salt. Blend on high speed until the mixture is completely smooth and well combined, about 2-3 minutes. If your blender is smaller, you may need to blend in two batches.
Step 2: Taste the mixture and adjust the rum or spices to your preference. For a stronger Coquito recipe Puerto Rican authentic flavor, you can add a little more rum; for a sweeter drink, a touch more condensed milk can be added.
Step 3: Pour the Coquito into clean, airtight glass bottles or jars. Store it in the refrigerator for at least 4 hours, but preferably overnight, to allow the flavors to meld and the drink to chill thoroughly. The chilling process is crucial for the best taste and texture of this Coquito recipe Puerto Rican authentic.
Step 4: Before serving, give the Coquito a good shake, as some separation may occur. Pour into small glasses or shot glasses. Garnish each serving with a sprinkle of ground cinnamon or a cinnamon stick. Enjoy your authentic Coquito recipe Puerto Rican authentic!