Directions

1. Preheat oven to 350°F. Whirl vanilla wafers in a food processor until fine crumbs form. Pour crumbs into a bowl, measure 2 cups, and return them to the food processor. (Save any extra crumbs for other uses.)
2. Add brown sugar and melted butter to crumbs. Pulse until mixture resembles slightly wet sand. Press crumbs over the bottom and up the sides of a 9- or 10-inch pie plate, using a dry measuring cup to pack the crumbs. (For a 9-inch pie pan, the crust will be thick, so you may prefer to save about 1/4 cup of the crumb mixture for other uses or to sprinkle around the edge of the finished pie.)
3. Bake crust until lightly browned and set when lightly touched, 10-12 minutes. Remove from oven and let cool completely on a wire rack, about 1 hour.