Preheat the oven to 350 F. In a large bowl, whisk together flour, sugar, cocoa powder, salt, and baking soda.
Add in eggs, melted butter, and peppermint extract, and whisk until smooth.
Using a cookie scoop, drop brownie batter onto a large ungreased baking sheet at least 2-inches apart. Bake for 10-12 minutes.