• Thaw lemonade concentrate in the refrigerator overnight.
• Pour lemonade concentrate into a 2-quart pitcher. Add 3-1/2 cans of cold water and stir to mix. (Use the lemonade can to measure the water.)
• In a small food processor or a blender, puree 1 cup of blackberries.
• Add the pureed blackberries to the lemonade.
• Refrigerate until ready to drink.
• Fill a pint glass halfway with ice. Add 3/4 cup blackberry lemonade to the glass.
• Add 1/2 cup champagne OR sparkling white grape juice. Gently stir to mix.
• Top with whole blackberries or lemon slices.

To make a pitcher of Blackberry Lemonade Spritzer:

• Make blackberry lemonade as directed above in a 1-gallon pitcher.
• Add a whole bottle of champagne OR sparkling white grape juice to the lemonade. Gently stir to mix.
• If desired, add whole blackberries or lemon slices to the lemonade.
• Serve in tall glasses with ice, topped with whole blackberries.