Preheat the oven to 350°F (180°C). Prepare a baking sheet by lining itwith parchment paper or a silicone baking mat.
2-Melt the butter:
In a microwave-safe bowl or a small saucepan, melt the butter untilfully liquid.
3-Mix the wet ingredients:
In a large bowl, add the melted butter and brown sugar. Mix well untilfully incorporated.
Add the whole egg, the egg yolk, and the vanilla extract. Mix again untileverything is well combined.
4-Add the dry ingredients:
In the same bowl, add the flour, baking soda, and salt. Mix until thereare no lumps and the dough is uniform.
5-Chill the dough (optional):
If desired, you can refrigerate the dough for at least 30 minutes. Thiswill help the cookies maintain their shape better when baking.
6-Form the cookies:
Form dough balls using approximately 3 tablespoons of dough foreach.
If desired, you can roll the dough balls in a bowl with the additionalsugar to coat them.
Bake:
Place the dough balls on the prepared baking sheet, leaving spacebetween them to allow for spreading.
Bake for 11 to 13 minutes, or until the edges are slightly golden but thecenters still look a bit soft.
Cool:
Let the cookies cool on the baking sheet for a few minutes beforetransferring them to a wire rack to cool completely.
Notes
For chewier, thicker, and more flavorful cookies: Allow the dough to rest in the refrigerator overnight. This enhances the texture and flavor of the cookies.
For softer and chewier cookies: You can bake the cookies without chilling the dough. They will be softer and chewier but slightly less thick.
Precise measurement: Make sure to measure the flour correctly. The most accurate way is to use a kitchen scale. If using measuring cups, fluff the flour with a spoon, spoon it into the measuring cup, and level it off with a knife.
Ingredient temperature: Ensure that the ingredients, especially the egg and egg yolk, are at room temperature for better mixing.
Baking control: The cookies will continue to cook a bit after removing them from the oven due to residual heat. Don’t worry if they look slightly soft in the center when you take them out.
Storage: Store the cookies in an airtight container at room temperature to keep them fresh. You can add a piece of bread to the container to keep the cookies soft.
Variations: You can add chocolate chips, nuts, or raisins to the dough for different flavor variations.