Preheat the oven to 350°F if baking the crust.
Add the graham cracker crumbs and sugar to a mixing bowl.
Stir to combine.
Pour in the melted butter.
Mix until the crumbs are evenly coated and look like damp sand.
Pour the crumb mixture into a 9-inch pie plate.
Press the crumbs firmly into the bottom and up the sides of the pie plate.
Use the bottom of a measuring cup or glass to pack the crust evenly.
For a baked crust, bake at 350°F for 8 to 10 minutes.
Let the crust cool completely before adding the filling.
For a no-bake crust, chill for at least 30 minutes before filling.