Step 1

Heat oven to 450°F. Make and bake pie crust as directed on box for One-Crust Baked Shell in ungreased 9-inch pie plate. Cool on cooling rack, about 20 minutes.

Step 2

In 4-quart saucepan, cook milk and pudding mix over medium heat 10 to 14 minutes or until mixture comes to a full boil, stirring constantly. Remove from heat. Add butterscotch chips; stir until melted and smooth. Let stand 5 minutes.

Step 3

Pour pudding mixture on top of cooled baked pie shell. Cover filling with plastic wrap. Refrigerate at least 3 hours until set.

Step 4

When ready to serve, heat oven to 450°F. In medium glass or metal bowl, stir egg whites, sugar, cream of tartar and vanilla with whisk until blended. Set over pan of simmering water; stir occasionally with whisk 14 to 18 minutes or until sugar has dissolved and egg mixture reaches 160°F. Pour into large bowl; beat with electric mixer on high speed 2 to 3 minutes or until stiff glossy peaks form. Remove plastic wrap from filling. Use small icing spatula to swirl meringue over top of chilled pie. Bake 3 to 5 minutes or until meringue peaks start to turn golden brown. Cool on cooling rack 20 minutes.

Step 5

Cut into wedges to serve. Store loosely covered in refrigerator.