1. In an old fashioned glass, also known as a lowball glass, mix the Campari and vermouth, and stir with a spoon.
2. To give it a fresh, fruity flavor, add ice and the orange peel. Stir gently.
3. Pour in the Cold Brew. If you wish, you can replace the Cold Brew with a ristretto chilled on ice.
4. Decorate the glass with a twist of orange peel and enjoy your refreshing Cold Brew Negroni.