01 - Preheat the oven to 400°F or set the toaster oven to medium-high.
02 - Combine granulated sugar, ground cinnamon, and a pinch of salt in a small bowl; mix until well blended.
03 - Spread softened butter evenly over one side of each bread slice.
04 - Sprinkle the cinnamon sugar mixture generously onto the buttered side of each bread slice.
05 - Place bread slices on a baking sheet with the sugar side facing up.
06 - Bake for 5 to 7 minutes until edges are golden and sugar is melted and bubbling.
07 - Remove from oven and let cool for 1 to 2 minutes before serving warm.