If you don't have a coffee machine, you can create something similar to espresso with instant coffee. You will need good quality instant coffee granules for my virgin Baileys recipe. Espresso is usually made with Arabica coffee beans, so pick a brand of instant coffee that does too. For a single shot of espresso (perfect for this non-alcoholic Irish cream), mix 1-2 heaped or  level teaspoons for instant coffee with 30ml/1oz of hot water. Test for strength and increase or decrease the coffee to taste. You can make a double shot by mixing 2-3 teaspoons (heaped or level) into 60ml/grams of hot water.