Preheat your oven to 350 degrees F and line a baking sheet with parchment paper or a silicone baking mat.
Spread the bugles into an even layer on your prepared baking sheet, then set aside.
In a saucepan over medium heat, combine butter and brown sugar. Bring to a boil, then continue to boil for 2 minutes, making sure to stir continuously.
Remove from the heat and pour in the vanilla extract and 1 tsp cinnamon, stirring to combine.
Pour the caramel toffee mixture over the bugles, mix to coat evenly, then bake for 10 minutes.
In the meantime, combine granulated sugar and remaining 2 1/2 tsp cinnamon.
Pour the cinnamon sugar on top of the warm bugles, then mix to coat each bugle evenly.
Let cool completely before storing or enjoying!