Preheat your oven to 350°F (175°C) and prepare an 8x8-inch baking pan by greasing it or lining with parchment paper.

In a mixing bowl, whisk together the melted unsalted butter and light brown sugar until well blended. Add the egg, honey, and vanilla extract, stirring until smooth.

Gently add the flour, salt, and half of the ground cinnamon to the wet mixture. Stir together until just combined.

Pour the batter into the prepared baking pan and smooth the top.

In a small bowl, combine the granulated sugar with the remaining half teaspoon of cinnamon and sprinkle it over the batter.

Bake in the preheated oven for 22-25 minutes, until the edges are firm and a toothpick comes out clean.

Allow the blondies to cool completely in the pan on a wire rack before cutting into squares.