Follow these steps to create the most delicious Lemon Sugar Cookies:

1. Preheat the Oven: Preheat your oven to 350°F (175°C). Line two baking sheets with parchment paper.
2. Combine Dry Ingredients: In a bowl, whisk together flour, baking soda, and salt. Set aside.
3. Cream Butter and Sugar: In a large mixing bowl, beat the softened butter and granulated sugar until light and fluffy.
4. Add Egg and Flavor: Mix in the egg, lemon zest, lemon juice, and vanilla extract until well combined.
5. Mix Dry Ingredients: Gradually add the flour mixture to the wet ingredients. Mix until just combined and no flour pockets remain.
6. Scoop the Dough: Using a cookie scoop or spoon, drop dough onto the prepared baking sheets, spacing them about 2 inches apart.
7. Flatten Dough: Lightly press each dough ball to flatten them slightly, ensuring they bake evenly.
8. Bake: Place in the oven and bake for 10-12 minutes, or until the edges are golden and the cookies look set.
9. Cool the Cookies: Once baked, remove from the oven and let the cookies cool on the sheets for about 10 minutes. Then, transfer them to wire racks to cool completely.
10. Dust with Powdered Sugar: Once completely cooled, dust the top of each cookie with powdered sugar for a lovely finish.