Step 1

Add the blackberries to a small sauce pan and mash them with a fork or potato masher until broken down into small bits.

Step 2

Add the sugar, water and lemonade and bring to a simmer.

Step 3

Simmer over low-medium heat for about 10 minutes.

Step 4

Strain the mixture to remove the bits of blackberry, add the juice from the lemon and refrigerate the liquid until cooled.

Step 5

Once cooled, pour the liquid evenly among 4 glasses filled with ice cubes.

Step 6

Add seltzer until glass is full.

Step 7

Garnish with lemon slices, mint and extra blackberries.