In a mixing bowl, combine the graham cracker crumbs, sugar, and melted butter. Mix them until everything is sandy, scraping up any crumbs that have clumped together at the bottom.
Pour moistened graham cracker crumbs into a 9-inch pie plate. With medium pressure, use your hands and the side of a measuring cup to press the crumbs along the bottom and sides of the pan. If you pat too hard, the crust will be hard; if you don't pat much, the crumbs won't stick together. Don't bother making a crust over the rim; it doesn't usually stay attached.
Bake crust at 350F for 10 minutes. (It will smell amazing!)
If baking a filling into the crust, you can fill and bake immediately.
Cool completely before filling with a premade filling. Crusts filled before cooled run the risk of becoming soggy.
Notes
You can use premade graham cracker crumbs, or make crumbs from graham crackers. You will need around 10.5 graham crackers, a little more than 1 sleeve. Seal them in a zipper bag, and crush them with a mallet or your hands. You want the crumbs to be fine, not chunky.You can substitute animal crackers, chocolate graham crackers, or any other plain cookie for the crumbs. If you run short on graham cracker crumbs, you can also substitute in a small amount of a plain corn, oat, or rice cereal, very finely crushed. Some cereal holds its texture if not pulverized, and cereal will change the flavor of the crust.You can also use a deep dish pie plate instead of a standard-sized dish. Your crust may be a little thinner than mine. Adapted from the Betty Crocker Cookbook.Calorie count calculated in MyNetDiary and is an estimate only. And, of course, calorie count is for the crust alone, without other fillings.