01 -
Preheat oven to 165°C. Line a baking sheet with parchment paper.
02 -
In a medium bowl, mix crushed graham crackers, sugar, salt, and cinnamon if using.
03 -
Pour in melted butter and vanilla extract if using. Stir until all crumbs are evenly coated.
04 -
Spread the mixture evenly onto the prepared baking sheet. Bake for 8–12 minutes or until light golden brown and fragrant, monitoring closely to avoid burning.
05 -
Cool the graham cracker mixture to room temperature; it will crisp as it cools. Once cooled, break into coarse crumbles.
06 -
Store in an airtight container for up to 3 days at room temperature, 1 week in the refrigerator, or up to 3 months in the freezer. Allow crumble to come to room temperature before serving.