Preheat the oven to 375°F and line two baking sheets with parchment paper.
In a large mixing bowl, combine the butter, sugar, vanilla, cinnamon, salt and cayenne. Mix until smooth.
Add the egg and mix until it’s fully incorporated.
Now fold in the flour, cocoa powder, baking soda, and chocolate chips. Mix only until you no longer see dry spots.
Use a 1-inch cookie scoop or about ½ tablespoon to shape the cookies, adding them to the parchment-lined baking sheets as you go. There should be a couple of inches between them, as they will spread a little. Bake in the 375°F preheated oven just until they’re solid, about 10 minutes.
Let them cool on the baking sheets for about 10 minutes before serving.