📖 Instructions

1. Prep Your Ingredients & Workspace: First things first, get all your ingredients out and let the butter soften on the counter. Cold butter is a no-go for good creaming! Line two large baking sheets with parchment paper; this makes cleanup a breeze and prevents sticking.
2. Cream Butter and Sugar: In a large mixing bowl, combine your softened unsalted butter and granulated sugar. Using an electric mixer (either a stand mixer with the paddle attachment or a good hand mixer), beat them together on medium speed until the mixture is light, fluffy, and pale in color. This usually takes about 2-3 minutes. Don't rush this step, it's key to the cookie's texture.
3. Add Egg and Vanilla: Crack in the large egg and add the vanilla extract to the creamed butter and sugar. Beat again on medium speed until everything is just combined. Scrape down the sides of the bowl with a spatula to make sure all ingredients are incorporated.
4. Whisk Dry Ingredients: In a separate medium bowl, whisk together your all-purpose flour, cocoa powder, baking soda, and salt. Whisking ensures there are no lumps of cocoa and the leavening agents are evenly distributed.
5. Combine Wet and Dry: Gradually add the dry ingredient mixture to the wet ingredients in two or three additions, mixing on low speed after each addition until *just* combined. Stop mixing as soon as you no longer see streaks of flour. Overmixing develops gluten too much, which can lead to tough cookies. We want tender!
6. Chill the Dough: Divide the dough in half. Shape each half into a disc, wrap it tightly in plastic wrap, and pop it into the refrigerator for at least 1 hour. Chilling is crucial here – it prevents spreading and helps the cookies hold their shape. You can chill it for up to 2 days if you're planning ahead.
7. Preheat Oven & Prep for Rolling: Once the dough is properly chilled, preheat your oven to 350°F (175°C). Lightly flour a clean, flat surface (your countertop works great!) and your rolling pin.
8. Roll and Cut Cookies: Take one disc of chilled dough out of the fridge. Roll it out to about 1/4 inch thickness. Use your favorite cookie cutters to cut out shapes. Gently transfer the cut-out cookies to your prepared baking sheets, leaving about an inch between each cookie. Re-roll any scraps and cut more cookies until all the dough is used.
9. Bake to Perfection: Bake the cookies one sheet at a time in the preheated oven for 8-10 minutes. Baking time will vary based on your oven and cookie size. You'll know they're done when the edges are set and they look firm, even if the centers still seem a *tiny* bit soft. They'll continue to set as they cool.
10. Cooling Down: Let the cookies cool on the baking sheets for about 5 minutes before carefully transferring them to a wire cooling rack to cool completely. This helps them firm up without breaking.
11. Decorate (Optional) and Enjoy: Once completely cool, these cocoa sugar cookies are ready for decorating if you wish (a simple glaze or powdered sugar dusting is lovely!) or simply enjoyed plain. Store them in an airtight container at room temperature for up to 5 days. They're best within the first few days, though!