Step 1

Combine the sugar and water in a sauce pan over medium heat and bring to a simmer.

Step 2

Stir until the sugar dissolves, then add the thyme and cook for 30 seconds more.

Step 3

Remove from heat and let steep for 1 hour.

Step 4

Strain the thyme leaves out of the simple syrup.

Step 5

Combine gin, lemon juice, simple syrup, and aquafaba in a cocktail shaker filled with ice, and shake until foamy.

Step 6

Pour into two glasses, then top off each glass with 2-3 ounces club soda.

Step 7

Garnish with lemon slices and a sprig of thyme.