Preheat Oven: Preheat your oven to 325°F (163°C).
Crust Mix: In a mixing bowl, combine the crumbled croissants, almond flour, and sugar.
Add Butter: Stir in the melted butter until the mixture is moistened.
Form Crust: Press the crust mixture into the bottom of a 9-inch (23cm) springform pan, creating an even layer.
Bake: Bake the crust for about 10 minutes. Remove from the oven and let it cool while preparing the filling.