• 1½cups Campari
• 1½. cups gin
• 1½ cups sweet vermouth
• 1cup fresh orange juice
• Orange slices (for serving)

Mix 1½ cups Campari, 1½ cups gin, 1½ cups sweet vermouth, and 1 cup fresh orange juice in a pitcher to combine. Divide evenly between 2 airtight containers. Cover negroni base and freeze until semi-frozen (it won’t fully freeze because of the alcohol), at least 8 hours.When ready to serve, transfer 1 container of negroni base to a blender and add 4 cups ice. Blend on high speed until drink is thick and smooth. Divide among 4 glasses and garnish with orange slices. Repeat with remaining negroni base and another 4 cups ice if making all 8 servings, or save for another sunny day.