1 1⁄2 oz Apple brandy
1⁄2 oz Grenadine
1 pn Malic acid (3/4 g)
1 pn Citric acid (1/2 g)
1 twst Lime peel (expressed and discard)
Combine at room temperature and stir until acid is dissolved. Stir with cracked ice, strain, serve up, express and discard lime peel.
Inspired by Kevin Liu's Martini Sour. Malic acid has strong green apple notes.