The Butterfly Flower Tonic is a zero-proof showstopper — Top Hat Classic Tonic Syrup carbonated on CO₂, finished with a 1 oz float of Butterfly Truth Serum at service. The indigo butterfly pea flower extract shifts from deep blue to purple-pink on contact with the citrus in the tonic. A non-alcoholic program that everyone at the table wants.
Every bar program needs a zero-proof anchor that looks as good as the cocktails. The Butterfly Flower Tonic delivers — tonic bitterness, carbonation, and a color-change moment that non-drinkers can enjoy the same way as everyone else. Run it alongside the spirit-based Butterfly G&T or as a standalone mocktail program.
Batch Method
- Add 4 qts Top Hat Classic Tonic Syrup to a clean 5-gallon Cornelius keg.
- Add 12 oz fresh lime juice if using.
- Add 15 qts cold filtered water.
- Seal the keg and shake vigorously side to side for 2 full minutes.
- Carbonate with CO₂. See instructions below.
- Refrigerate minimum 12 hours before first service.
- Pour ~6 oz over ice into each glass. Garnish with sliced lime and fresh mint.
- Float 1 oz Butterfly Truth Serum over the back of a bar spoon onto each pour at service — watch the color shift.
- Reshake twice daily to re-integrate ingredients.
Pro move: Add the lime juice to the keg to guarantee the pH triggers the color reaction consistently every pour. Float the Butterfly Truth Serum slowly over the back of a bar spoon so it sits on top before mixing — the full indigo to purple-pink shift happens in front of guests. Run this alongside the spirit-based version so non-drinkers get the exact same visual experience.
- Insert charging stone lid at 45° and spin to align seal. Clamp firmly closed.
- Set CO₂ regulator to 20–25 psi.
- Connect gray/silver Cornelius connector to center plug of charging stone lid.
- Pull up pressure release ring 30 times quickly. Release between each pull.
- Refrigerate 24 hours. Cold liquid absorbs carbonation better.
- Once cold: pull pressure release ring 30 more times.
- Test flow. Reduce to 15 psi if foamy. Maintain 20–25 psi without foam.