In the cocktail shaker, add the 6-8 fresh blackberries and 3-4 lemon wheels. Using the muddler, mix the ingredients well. Allow to rest for 5 minutes.
Add the blackberry vodka, limoncello, simple syrup and blackberry lemon flavored seltzer water to the shaker along with several ice cubes and place the cap on the shaker.
In a 6-ounce glass, add ice cubes. Strain the mixture over the ice. Garnish with a fresh lemon wheel and/or fresh blackberry.
Keyword on the rocks bramble, simple blackberry bramble