Came back again to the walk-up window just to get some frozen drinks.  This time around I got an Oreo frrrozen hot chocolate.  Talk about overpriced!!  Over $10 for something so \"meh\" and runny!  Jack in the Box's Oreo Shake is so much better for much much less.  Also, Sugar Factory across the street has similar yet tastier frozen drinks.  Think I'll pass on Serendipity next time!