New York Cheesecake (my brother's recipe)

1 1/2 c sour cream
1/2 c sugar
2 tsp vanilla
1# cream cheese
2 T melted butter
1 9" pie crust, graham or chocolate
2 eggs

-blend sourcream,sugar, eggs and vanilla in blender for 1min
-add cream cheese; blend until smooth
-pour in melted butter while blending batter
-pour into crust
-bake in lower 1/3 of oven @ 325º for 45min

-when baking is finished remove from oven and turn on oven to broil; broil cheesecake until top begins to show attractive spots of brown
-refrigerate for 4 hours, preferably overnight, before cutting

Option:
for chocolate cheesecake add 1/4 c cocoa powder and increase sugar to desired amount