Special equipment: An 8-inch springform pan
Let the butter pecan ice cream soften slightly at room temperature for about 10 minutes. Evenly spread it on the bottom of an 8-inch springform pan; freeze until hardened, about 30 minutes.
Arrange the fig cookies in an even layer over the ice cream (don't press them down into it) so they fit snugly together, cutting to fit if necessary.
Meanwhile, let the pistachio ice cream sit at room temperature for about 10 minutes. Evenly spread it over the cookies. Cover the top of the cake with plastic wrap, and freeze until solid, at least 4 hours up to overnight.
When ready to serve, remove the plastic wrap and let the cake sit at room temperature for 10 minutes.
Meanwhile, whip the cream with an electric mixer on medium speed in a small bowl until firm peaks form; stir in the sugar. Run a knife around the cake edge, and remove the springform collar. Top with the whipped cream, and sprinkle with the pistachios. Cut into slices with a sharp, heavy knife.
From Food Network Kitchen