Ingredients:
- 8 oz (227g) unsalted butter, softened
 - 3/4 cup (150g) granulated sugar
 - 1/4 tsp salt
 - 1 1/2 tsp pure vanilla extract
 - 1 large egg yolk
 - 2 cups (240g) all-purpose flour
 
Instructions:
1. Preheat the oven:
- Preheat your oven to 350°F (175°C).
 - Line a baking sheet with parchment paper or a silicone baking mat.
 
2. Cream the butter and sugar:
- In a large bowl, cream together the softened butter and granulated sugar using an electric mixer or hand whisk.
 - Beat until the mixture is light and fluffy, about 2–3 minutes.
 
3. Add the egg yolk and vanilla:
- Add the egg yolk and vanilla extract to the butter mixture and beat until fully incorporated.
 
4. Add the flour and salt:
- Gradually add the all-purpose flour and salt to the mixture.
 - Mix on low speed or by hand until just combined, forming a soft dough.
 
5. Shape the cookies:
- Scoop out tablespoon-sized portions of dough and roll them into balls.
 - Place them on the prepared baking sheet, spacing them about 2 inches apart.
 - For a slightly flattened appearance, you can gently press the tops of the dough balls with the back of a fork or your fingers.
 
6. Bake:
- Bake the cookies in the preheated oven for 10–12 minutes, or until the edges are lightly golden but the centers are still soft.
 - Keep an eye on them, as baking times may vary depending on your oven.
 
7. Cool and enjoy:
- Let the cookies cool on the baking sheet for about 5 minutes, then transfer them to a wire rack to cool completely.
 - These cookies are best enjoyed with a cup of tea or coffee!
 
Tips for Perfect Butter Cookies:
- For extra flavor, you can add a few tablespoons of finely chopped nuts (like almonds or hazelnuts) to the dough.
 - If you want to decorate the cookies, try dipping the edges in melted chocolate or sprinkling sugar on top before baking.
 
