Brew your espresso or strong coffee. 3 oz freshly brewed espresso
Combine the water and sugar in a small saucepan. 4 oz water, 1 cup white sugar
Heat over medium, stirring until the sugar fully dissolves. This takes about 2 to 3 minutes. You don't need to boil it.
Remove the sugar syrup from the heat and stir in the espresso, vanilla, and salt. 1 tsp vanilla paste, small pinch of salt
Let cool completely, then pour into a clean glass jar or bottle.
Store in the fridge and use within 2 to 3 weeks.
Notes
Coffee: Use the strongest coffee you have for the best flavor. Espresso gives the most intense result, but cold brew concentrate or very strong brewed coffee both work well.Vanilla: Vanilla paste gives a richer flavor but vanilla extract is a perfectly good substitute at the same quantity.Storage: Keep in a sealed jar or bottle in the fridge for 2 to 3 weeks.How to use it: Use it anywhere you'd use coffee liqueur in a mocktail. It's great in alcohol-free espresso martinis or stirred into milk or cream over ice.