To make your own orgeat, fill a nonreactive container with 50g chopped blanched almonds and 2 cups filtered water. Cover and refrigerate for 24 hours. Transfer mixture to blender; add 2⅓ cups superfine granulated sugar, ½ oz white rum, 1 drop orange-flower water and a pinch of kosher salt. Blend on medium until sugar is dissolved; strain liquid through cheesecloth and wring out. This yields 2 cups orgeat, which can be stored in a clean bottle in the fridge for up to 10 days.