Preheat your oven to 375 degrees and line two baking sheets with parchment paper.
Combine the flour, salt, baking powder, and cinnamon in a medium bowl.
Mix the melted butter, sugar, and brown sugar in a large bowl for one minute.
Add the vanilla extract and egg, mixing until just combined.
Slowly add in the dry ingredients, mixing until just combined.
Use a 2 tbsp cookie scoop to place the dough onto the baking sheets.
Sprinkle each ball of dough with the cinnamon-sugar mixture.
Bake for 12-15 minutes until the edges are lightly brown.
Let the cookies cool for 2-3 minutes, then transfer them to a baking rack for an additional 15 minutes.