Lula's Pennsylvania Dutch Sour Cream Apple Pie

Grrrrrgh!
Course : Pies
From: HungryMonster.com
Serves: 8
 

Ingredients:

1 crust 9 inch pie crust
-----FILLING-----
1 1/4 cups Sour cream
1 cup Sugar
3 tablespoons Flour
1/4 teaspoon Salt
1 1/4 teaspoons Vanilla
4 cups Thin sliced tart apples
1 large Egg -- beaten
-----CRUMBS-----
1/4 cup Cold butter
1/3 cup Flour
1/3 cup Brown sugar
 

Preparation:

Blend crumb ingredients together and set aside. Combine sour cream, sugar, flour, salt and vanilla. Add apples and beaten egg. Bake in shell for 25 minutes @ 400F. Remove from oven, add crumbs. Return to oven for 20 minutes. Cool and refrigerate. Serve when cold.