Prep Glass: Fill an Old Fashioned glass with ice cubes and give it a quick stir. Set it aside.
Prep Sugar: Place 1 cube Demerara sugar in your stirring glass.
Add Bitters: Soak the sugar cube with 4 dashes Angostura aromatic bitters.
Muddle: Add 1 bar spoon soda water in the stirring glass. Then, use a muddler to crush the sugar, water and bitters together. If using powdered sugar, it’s not necessary to muddle: simply stir well to dissolve the sugar.
Add Cachaça: Pour 2½ oz Cachaça into the stirring glass as well. Using the bar spoon, stir well so the sugar dissolves.
Add Ice: Fill the stirring glass with ice cubes.
Stir Gently: Fill the mixing glass with ice. Using a bar spoon or a long stirrer, stir well (for about 15-20 seconds). Give it a taste and stir a bit more if you feel like more dilution is necessary.
Strain: Remove the ice in the Old Fashioned glass and refill it with fresh, new ice cubes. Then, using the cocktail strainer, strain the drink into the ice-filled glass.
Garnish: Garnish with an orange zest twist (to do so, express the orange zest on top of the glass. You can either discard it after or place it on the rim of the glass for an added orange touch). Serve immediately.