Start by mixing equal parts gin, sweet vermouth, and Campari in a large mixing glass.
Using a spoon, gently stir the ingredients together. This is important! It’s not recommended to shake a negroni in a mixer with ice, as the ice will dilute the drink.
Add ice to a glass, and pour the mixed negroni into the glass. (Note - if you’re making a large batch of this cocktail, be sure to give it another stir after you add it to the individual glasses to ensure it’s well mixed.)
Garnish the glasses with an orange peel or a slice of orange to bring out the citrus notes in the campari.
Serve immediately, or store the mixed negroni in the refrigerator until ready to serve.
Notes
The classic Negroni drink should be stirred, NOT shaken, then poured over ice. Shaking the drink in ice will dilute the flavor.
To make a large batch, increase the recipe ingredients and stir everything together in a large pitcher. Just be sure to stir the individual drink once you pour it over ice to ensure the ingredients are well combined.