1 cup flour
1 stick cold unsalted butter
1/2 teaspoon salt
1 teaspoon sugar
1/4 cup sour cream
Combine flour, sugar and salt in a medium bowl.
Add butter to the dry ingredients. Use a pastry cutter or two knives to cut butter into mixture. Continue cutting until pea-sized pieces form. Add sour cream and stir to combine.
Shape dough into a round disk and wrap with plastic wrap. Refrigerate 1 hour.
Roll dough out onto a floured surface to 1/8-inch thick. Place in pie plate and trim edges, as needed. Do not pre-bake crust before filling.