A cold-syrup copycat of McDonald's Sprite Berry Blast that replicates the sharp carbonation mouthfeel using the hypercarb chilling technique. Ready in 5 minutes with tested syrup ratios.
Syrup ratio guide: 1 tsp = lightly fruity and subtle; 1.5 tsp = closest to McDonald's (recommended); 2 tsp = bold berry, noticeably sweeter. Monin Mixed Berry runs sweeter than Torani at equal volume -- if switching brands, start at 1 tsp. Homemade berry syrup option: simmer 1 cup frozen mixed berries, 1/2 cup sugar, and 1/2 cup water for 10 minutes, strain, add a splash of lemon juice, and cool before using.