Prepare Your Ingredients: Start by gathering all your ingredients at room temperature for better mixing results.
Mix Dry Ingredients: In a bowl, whisk together all-purpose flour, Dutch processed cocoa, baking soda, and salt until evenly combined.
Cream Butter and Sugar: In another bowl, beat together softened unsalted butter and granulated sugar until light and fluffy.
Add Egg and Vanilla: Mix in the egg and vanilla extract until fully incorporated into your creamy butter mixture.
Combine Mixtures: Gradually add your dry ingredient mixture to the wet mixture until just combined; fold in coarsely chopped semi-sweet chocolate.
Bake Cookies: Preheat your oven to 350°F (175°C), drop spoonfuls of dough onto a lined baking sheet, and bake for about ten minutes until set but still soft in the center.