Substitutes:

• Vodka: If you don't have vodka, you can use rum (either light, dark, or even spiced) for a different but still delicious flavor. Although it will change the original flavor quite a bit, bourbon also works well in this drink.
• Coffee Liqueur: Kahlua is a popular choice, but any coffee liqueur will work. If you don’t have any coffee liqueur on hand, you can use coffee syrup as an alternative.
• Irish Cream: Baileys is the go-to, but many other brands are available. If you cannot find any Irish cream at all or are looking for a vegan alternative, almond milk creamer is a great non-dairy option.
• Espresso or cold brew coffee: Strong-brewed coffee works well if you don’t have access to an espresso machine. Instant espresso powder mixed with hot water can also be a quick substitute, although it will certainly alter the final flavor of the cocktail.

Making a Pitcher of Shaft Cocktail:

• Scale: To make a pitcher that serves 8, multiply all the ingredients by 8. That would be 8 oz of vodka, 6 oz of coffee liqueur, 8 oz of Irish cream, and 8 espresso shots or 8 oz of cold brew coffee.
• Mix: Combine the vodka, coffee liqueur, Irish cream, and coffee in a large pitcher. Add ice and stir well.
• Serve: Strain to remove the ice and serve immediately into ice-filled Old Fashioned glasses. If you have some leftovers, be sure to keep them in the fridge (make sure no ice cubes are left inside) in an airtight container.

Making it Vegan:

• Irish Cream Substitute: Use a vegan Irish cream alternative like Baileys Almande, or make your own using almond milk creamer mixed with cocoa powder and sweetener.
• Coffee Liqueur: Be careful while selecting your coffee liqueur as some brands such as Kahlúa are not vegan-friendly. Always check the brand's website or contact them directly to ensure their products are vegan.
• Proceed As Usual: Follow the original steps using these vegan substitutes to enjoy a vegan version of the Shaft Cocktail.