1-First, cream the butter and powdered sugar until fluffy and creamy, which takes about 1 minute, to build a smooth base for your dough.

2-Next, mix in the cocoa powder and vanilla extract, making sure to scrape the bowl sides and bottom for even distribution.

3-Then, add the flour and mix until the dough is smooth, scraping as needed to eliminate any lumps.

4-After that, shape the dough into a log, wrap it in plastic wrap, and chill for at least 1 hour or overnight for deeper flavors keeping it round by standing it upright in a tall glass. Once chilled, preheat your oven to 350°F and line baking sheets with parchment paper or silicone mats. Slice the dough into ¼-inch thick rounds and place them 2 inches apart on the sheets.

5-Finally, bake for 14 to 17 minutes until the glossy sheen fades, then cool completely before removing from the sheets. This step ensures the cookies set properly and maintain their texture. For variations, you can adjust based on dietary needs, like using gluten-free flour, as mentioned in other parts of this article.