"This is an excellent peanut butter pie recipe. My grandmother requested it many years ago from a restaurant that served it. Everyone who has had this pie loves it."
1Mix confectioners' sugar and peanut butter until mixture has a crumbly texture. Sprinkle half over the bottom of the shell.
2In the top of a double boiler, combine milk, 2/3 cup sugar, salt, vanilla, cornstarch, and egg yolks. Cook over medium-low heat until thick. Pour filling into crust.
3Beat egg whites until foamy. Add cream of tartar, and continue beating. Gradually add 6 tablespoons sugar, and continue beating until stiff peaks form. Spread over the top of the pie. Sprinkle with remaining peanut butter mixture.
4Bake at 325 degrees F (165 degrees C) for 30 minutes.