Preheat your oven to 160°C (320°F) and line a baking sheet with parchment paper.

In a medium-sized mixing bowl, combine crushed graham crackers, granulated sugar, a pinch of kosher salt, and ground cinnamon if using.

Pour the melted unsalted butter and vanilla extract into the dry ingredients and fold until coated.

Spread the mixture evenly on the baking sheet and gently press down.

Bake for about 8 to 12 minutes until light golden brown and fragrant.

Let it cool completely on the baking sheet, then break into clusters and store in an airtight container.