Preheat oven to 350 degrees F and prepare a sheet pan with parchment paper
In a microwave safe bowl, melt the butter until almost fully melted but not hot
Add the light brown sugar, granulated sugar and vanilla extract into the melted butter and whisk until combined
Add the egg and continue whisking until combined
Scoop the flour, baking soda, cinnamon and salt into the bowl with the butter mixture and using a spatula, stir until fully incorporated
Using a 1 tablespoon scoop or spoon, scoop the batter into a ball and place on the prepared sheet pan
Once all the dough is scooped, roll each dough ball into the cinnamon sugar until fully coated
Place the cookie dough back onto the sheet pan about 3 inches apart
Bake the cookies at 350 degrees F for 7-8 minute and the cookies have slightly puffed up and there are a few small cracks on the top
Remove the cookies from the oven and allow them to cool for 5 minutes
Serve and Enjoy!!!