“Highly-anticipated Gracie’s ice cream parlor is slated to open at 22 Union Square in Somerville the week of Nov. 9, says co-owner Aaron Cohen, who runs the popular dining event company Eat Boston.” It was first slated to open on Nov. 7. His shop will stock unusual flavors: Look for chocolate fluff, fruity pebbles, and cold-brew coffee, to name a few. And who needs a boring sugar cone? Gracie’s offers cones lined with toasted marshmallow fluff. The shop plans to be open from 3 p.m. until 9 p.m. on weekdays, and from noon until 9 p.m. on weekends.