Preheat the oven to 350 degrees Fahrenheit. In a small bowl, melt ¼ cup unsalted butter in the microwave.
In a separate bowl, combine ½ cup sugar and 1 tablespoon cinnamon then stir to combine.
Lay 6 medium flour tortillas flat and brush evenly with the melted butter on one side. Sprinkle generously with the cinnamon and sugar mixture. Carefully flip the tortillas over and repeat the butter and sugar mixture on the other side.
Using a knife or a pizza cutter, cut the tortillas into small triangles and place them on a baking sheet.
Bake for 9-11 minutes or until the tortilla chips are crispy.