You will need...
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4 cl
Sir Edward’s Finest
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1
Sparkling water
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1
dash of Angostura Bitters
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1
sugar cube
Mixture
In a mixing glass filled with 2/3 ice cubes, pour the bitters on the piece of sugar and pour Sir Edward’s whisky. Mix and then add sparkling water. Pour into the old-fashioned glass decorated with a zest of orange.