Here is the recipe for Volcano Pie...
2 ounces unsweetened chocolate
1 tablespoon butter
1/3 cup boiling water
1 cup sugar
2 tablespoons corn syrup
1 teaspoon vanilla
Over low heat or in a double boiler, melt chocolate and butter. Add boiling water, stir well, and add sugar and corn syrup. Bring to boil, cover, and continue boiling for three minutes. Uncover, reduce heat and cook for two more minutes. Do not stir. Take off heat and add vanilla.
Ice Cream Pie
1 prepared chocolate-cookie or graham-cracker pie crust
1/2 gallon vanilla ice cream
1 cup peanut butter
1 cup chocolate chips
Let ice cream soften a bit. Combine ice cream and peanut butter. Mix in chocolate chips (raisins or peanuts are also great). Pile ice cream into prepared crust and mold into your favorite volcano shape. Freeze until ice cream has re hardened (4 hours or more). Remove from freezer and scoop out a "crater" in the top of your volcano. Pour fudge sauce into the "crater" and let "lava" flow down the slopes of your volcano. Dust with cocoa and powdered sugar forced through a mesh strainer. Decorate with raisins, chocolate malted-milk balls, or whatever you like.
This recipe was gathered from Kids Discover Volcanoes.