You can make a crumb crust out of lots of things. In my former life I used crushed graham crackers. Now I use Fiber One Original cereal, mostly because it’s slightly sweet, yields easily to added flavors and has TONS of fiber to offset the total carb load. But you can use any cereal you like. If you are comfortable doing so, you can even use graham crackers (with the awareness that you’re also accepting a considerable amount of carbs and some sugar along with them). To make a crumb crust, you basically combine 2 cups of whatever crumb you’re using (I pulsed my cereal in my Magic Bullet blender to make it into crumbs) with about 2 tbsp of butter OR low-cal baking spread (I usually use Blue Bonnet Light but I was out so I used butter this time). Squish them together with your hands until they look like wet sand. Then press the mixture into a pie crust and bake at 350 for 10-15 minutes or until hardened.