Cream the Base: In a large bowl, cream together the softened butter, 1 cup of sugar, and lemon zest. Beat for about 3 minutes until the mixture looks pale, fluffy, and fragrant.
Add Wet Ingredients: Add the egg, fresh lemon juice, and vanilla to the bowl. Mix until the batter is smooth and well-combined, making sure to scrape the sides of the bowl.
Mix in Dry Ingredients: Add the flour, baking soda, and salt to the bowl. Mix on low speed just until the white streaks disappear so the cookies stay tender and soft.
Chill the Dough: Cover the bowl and refrigerate for at least 2 hours. Chilling prevents the dough from spreading too much and makes it easier to handle.
Prep for Baking: Preheat your oven to 350°F (175°C) and line two large baking sheets with parchment paper or silicone mats.
Shape and Roll: Scoop 1-inch balls and roll them in granulated sugar first, then heavily in powdered sugar. This double-coat ensures a perfect, bright white crinkle.
Bake: Place the balls 2 inches (5cm) apart on the sheets. Bake for 10–12 minutes until the edges are set and the crinkle pattern is fully formed.
Cool: Allow the cookies to rest on the hot baking sheet for 5 minutes to set. Transfer them to a wire rack to cool completely before serving.