Preheat oven to 250 degrees. Place pretzels into a large bowl.
Combine melted butter, cinnamon and sugar in a small bowl and pour over pretzels. Stir with a spatula or mix with your hands to completely coat the pretzels.
Spread out on an ungreased cookie sheet and bake at 250 for about 30 minutes, stirring at 15 minute intervals.
Allow to cool completely before enjoying.