In a mixing bowl, combine 1 cup of fresh heavy cream and 1 cup of Irish whiskey.
Whisk the mixture until well combined and slightly thickened.
Add 3 tablespoons of sweetened condensed milk and 2 tablespoons of chocolate syrup.
Incorporate 1 teaspoon of butterscotch flavoring and 1 teaspoon of vanilla extract.
Sprinkle in 1 tablespoon of instant coffee granules for a subtle kick.
Gently whisk the mixture until all the flavors meld together.
Gradually pour in 2 tablespoons of sweetened condensed milk, whisking as you go.
Taste and adjust the sweetness according to your preference.
Sprinkle a pinch of ground cinnamon into the mixture and blend it for a smooth texture.
Ensure that the consistency is velvety and luxurious.