Step 1

Combine sugar, water, and blueberries in a small saucepan over medium heat. Bring mixture to a simmer, stirring occasionally, and cook until sugar has dissolved and blueberries have softened.

Step 2

Remove saucepan from heat and let cool for 10-15 minutes.

Step 3

Strain syrup into a separate bowl to remove the blueberries and set syrup aside. Save the berries for smoothies or jam!

Step 4

Add a few ice cubes to four cocktail glasses.

Step 5

In a large shaker, combine whiskey, lemon juice, and blueberry simple syrup. Add a handful of ice and shake to chill.

Step 6

Divide drink evenly between your four cocktail glasses.

Step 7

Top each cocktail with a splash of tonic water and serve immediately.