01 -
Preheat the oven to 163°C and line a baking sheet with parchment paper.
02 -
In a medium bowl, combine the crushed graham crackers, sugar, salt, and cinnamon if using. Add melted butter and vanilla if using, stirring until the crumb mixture is fully coated.
03 -
Evenly spread the crumb mixture on the prepared baking sheet. Bake for 8 to 12 minutes until lightly golden and fragrant, monitoring closely to prevent burning. The mixture will be soft when removed but will crisp upon cooling.
04 -
Allow the crumble to cool to room temperature, then break into pieces. Store in an airtight container for up to 3 days at room temperature, 7 days refrigerated, or 3 months frozen. Bring to room temperature before use.