Place one of the pie shells on a baking sheet. Gently remove the second shell from the foil tray and place on a lightly floured work surface. Using a small snowflake cutter, about 1 1/2 inches (3.5 cm), cut about 20 snowflake pieces from the piecrust. Place on a parchment paper-lined baking tray. Bake the pie shell according to the package directions, then bake the snowflake cut outs for 8 minutes or until golden brown. Cool completely.
Remove ice cream from the freezer and allow to soften slightly. Meanwhile, spread a thin layer of chocolate fudge sauce over the bottom of the pie shell. Spread ice cream over top of the fudge sauce and place in the freezer for at least an hour. Prepare the whipped topping according to the package directions. Spread whipped topping over the top of the pie.
DECORATE each snowflake with frosting, sprinkle with crushed peppermint dust and arrange artfully over the top of the pie. Serve frozen.