Step 1

To make the sweetpotato simple syrup

Step 2

Roast sweetpotatoes until they are deeply caramelised.

Step 3

Chop them into cubes and dust with 1 tbsp sugar. Sauté in a saucepan until sugar is caramelised.

Step 4

Add water and 2 cups of sugar and bring to a boil then cut the heat.

Step 5

Let mixture steep for an hour, stir then strain.

Step 6

To make the cinnamon sweetpotato chip

Step 7

Slice paper-thin pieces of a sweetpotato with a vegetable peeler.

Step 8

Dip in the simple syrup and place on wire rack.

Step 9

Dust lightly with freshly grated cinnamon.

Step 10

Bake at 65°C overnight or until crisp.

Step 11

To make the cocktail

Step 12

In a cocktail shaker add pisco, shrub, sweetpotato simple syrup and ice; shake vigorously.

Step 13

Rinse a martini glass with bitters.

Step 14

Strain ingredients in the cocktail shaker into the glass and garnish with a cinnamon sweetpotato chip.