Hazelnuts, known for their rich, buttery flavor and slightly sweet taste, are a versatile ingredient in the culinary world. When it comes to the context of alcohol and cocktails, hazelnuts are often utilized to add a unique and distinctive flavor profile. Their natural sweetness and nutty undertones make them an excellent addition to various spirits and liqueurs.

In the world of cocktails, hazelnut-flavored liqueurs, such as Frangelico (hazelnut liqueur), are popular choices for adding depth and complexity to drinks. These liqueurs are typically made by infusing alcohol with hazelnuts and other complementary flavors like vanilla and cocoa. Mixologists often use hazelnut liqueur in dessert cocktails, creamy concoctions, and coffee-based drinks to enhance their richness and provide a pleasant nutty note. Additionally, hazelnut syrup can be used as a non-alcoholic alternative to introduce the same delightful flavor into a variety of cocktails and mocktails.