If you don’t have Triple Sec, use juice from a fresh squeezed orange.
Add all ingredients in blender and pulse to start breaking down blueberries. Add 1 cup ice and blend on high to puree mixture. If using fresh berries, add another cup of ice and blend to make thick.
Pour in lime and coarse sugar-rimmed margarita glasses and top with a few fresh blueberries. Enjoy immediately.