1-First Step: Begin by preheating your oven to 325°F (165°C) and lining a baking sheet with parchment paper. This ensures even baking and easy cleanup later. While the oven heats, take your butter out of the refrigerator if it’s not already softened. The butter should be pliable but not melting or oily to room temperature.

2-Second Step: In a stand mixer fitted with the paddle attachment or a large bowl with an electric hand mixer, beat the softened butter and powdered sugar on medium-high speed. This is the most critical step in the entire recipe. Continue beating for approximately 5 minutes until the mixture is light, fluffy, and pale yellow. Pause occasionally to scrape down the sides and bottom of the bowl to ensure all ingredients are incorporated evenly. Proper whipping creates the air pockets that give these cookies their signature light texture.

3-Third Step: Add the vanilla extract and salt to the whipped butter mixture. Mix on low speed just until combined. Over-mixing at this stage can deflate the air bubbles you’ve worked so hard to create, so be gentle here.

4-Fourth Step: In a separate medium bowl, whisk together the all-purpose flour and cornstarch until well blended. This step ensures the leavening and tenderizing agents are evenly distributed throughout the flour before it meets the butter mixture.

5-Fifth Step: Reduce your mixer speed to medium-low and gradually add the flour mixture to the butter. Mix just until the dough comes together and no visible flour remains. The dough will be soft but should hold its shape when squeezed. Be careful not to overmix, which can develop gluten and lead to tough cookies.

6-Sixth Step: Using a tablespoon or cookie scoop, portion the dough into roughly tablespoon-sized balls. Briefly roll each portion between your palms to create smooth spheres. Place the dough balls on your prepared baking sheet, spacing them 1-2 inches apart to allow for slight spreading during baking.

7-Seventh Step: Gently flatten each dough ball with the tines of a fork, creating a classic crisscross pattern. If the fork sticks to the dough, dip it in powdered sugar first. This simple trick prevents sticking while adding a subtle sweetness to the surface.

8-Eighth Step: If you’re decorating, sprinkle nonpareils, jimmies, or colored sanding sugar over the flattened cookies now. The sprinkles will adhere nicely to the surface before baking.

9-Ninth Step: Bake the cookies for 12 minutes. They should remain light in color without browning significantly. The key is to remove them when they’re just set but still pale. Allow cookies to cool completely on the baking sheet before removing them. They’ll firm up as they cool, so patience here pays off.