In a small bowl or measuring cup, combine the cola-flavored syrup (3 tbsp), maraschino cherry syrup (1 tsp), amaretto syrup or almond extract mixture (1 tsp), and vanilla extract (1 tsp). Stir until homogeneous.

Add accent flavors

Add the orange oil or fresh orange zest (1 tsp), lemon juice (1 tsp), and dried prune or prune syrup if using (1 tsp). If you want a subtle smoky depth, add a very small amount of liquid smoke (about 0.05 tsp). Stir well and taste for balance.

If the concentrate tastes too sharp, sweeten gently with the simple syrup (1 tsp). If more body is desired, stir in the optional cane sugar (1 tsp) until dissolved.

Assemble the Drink

Fill a tall glass with about 1 cup of ice.

Pour 2 cups of cold carbonated water (soda water) into a separate pitcher or large measuring cup. Gently stir the flavor concentrate into the carbonated water — aim for gentle motions to retain fizz. Combine fully so the flavor is evenly distributed.

Taste and adjust: sample a tablespoon. If you want it sweeter, add up to 1/2 tsp more simple syrup; for brighter citrus, add a few drops more lemon juice or a tiny pinch more orange zest. If the cherry or almond notes are weak, add small increments (1/4 tsp) of maraschino syrup or amaretto syrup and re-check.

Pour the flavored soda over the ice in the prepared glass, leaving a little headroom for the garnish.

Garnish & Serve

Garnish with a maraschino or fresh dark cherry and an orange wheel on the rim or floated in the drink.

Serve immediately with a straw. Stir once before drinking to re-incorporate any settled flavor notes.