Think of this recipe as a blank slate. It will work with any vermouth you love to sip on and you can swap out any flavor of bitters that you think will compliment the vermouth. You should also adjust the sparkling water to your taste, equal parts is just a starting point.
2 oz sweet vermouth (Dolin Rouge is a great place to start)
2 oz sparkling water
4 dashes The Bitter Housewife Orange Bitters
Combine all ingredients in a glass with ice and give a gentle stir to mix.