Make cold foam.Half & half, vanilla syrup, and salt go into a French press. Use the French press plunger and pump 40 times. The cold foam will fluff up in volume from the air pushed into the half & half.
Combine cold brew coffee and Irish cream syrup.
Assemble drink.Pour Irish cream cold brew into a cup of ice. Top with cold foam. Optional: Sprinkle cocoa powder as garnish.
For the vanilla cold foam, instead of using vanilla syrup, you can use 1/2 teaspoon vanilla extract and 2 teaspoons of sugar.
The recipe uses vanilla syrup to flavor the cold foam but you can use the Irish cream syrup instead if you don't want to use another syrup.
Cold foam can be made with milk if you don't have half & half.
Cold brew coffee is what's used to make this drink but you can use coffee made in a coffee machine, Nespresso, or a Keurig. Make strong coffee in a coffee machine using 2-3 tablespoons of ground coffee for a cup of water.
To cool down hot coffee, put coffee in the freezer for 15 minutes or in the refrigerator for an hour.