Preheat oven to 350 °F. Place Lower Histamine Graham Crackers in the bowl of a food processor or blender and pulse to process/blend for about 30 seconds total, until the mixture is crumbs. Measure 1 cup of crumbs and save any extra for another use.
Butter the bottom and sides of a pie plate. Stir together the melted butter, sugar-free maple syrup, and crumbs in a medium bowl.
Press the mixture onto the bottom and sides of a pie plate.
Bake for ten minutes. Remove and cool slightly before using in a recipe.