Preheat oven to 350°F and line a baking sheet with foil.
Spread out crackers evenly on baking sheet. Set aside.
In a medium saucepan over medium heat, combine butter and brown sugar. Bring mixture to a boil, stirring constantly, and let boil 2 minutes.
Remove from heat and stir in the 2 teaspoons cinnamon and vanilla. Pour over crackers, and using a rubber spatula, stir until evenly coated.
Bake until mixture is bubbly, about 10 minutes.
While crackers bake, stir together the granulated sugar, remaining 1 teaspoon cinnamon, and salt. Set aside.
When you remove crackers from the oven, sprinkle with cinnamon sugar mixture, then set aside crackers to cool. Once cool, break into pieces, serve, and enjoy!
