* 1 cup (2 sticks) unsalted butter, softened
* 1 cup granulated sugar
* 1/2 teaspoon vanilla extract
* 2 large eggs
* 2 1/4 cups all-purpose flour
* 1 teaspoon baking soda
* 1 teaspoon cream of tartar
* 1/2 teaspoon salt
1. Preheat the oven to 375 degrees F (190 degrees C).
2. Line a baking sheet with parchment paper.
3. In a large bowl, cream together the butter and sugar until light and fluffy.
4. Beat in the eggs one at a time, then stir in the vanilla.
5. In a separate bowl, whisk together the flour, baking soda, cream of tartar, and salt.
6. Add the dry ingredients to the wet ingredients and mix until just combined. Do not overmix.
7. Drop the dough by rounded tablespoons onto the prepared baking sheet, spacing them about 2 inches apart.
8. Flatten each cookie slightly with a fork.
9. Bake in the preheated oven for 10-12 minutes, or until the edges are golden brown and the centers are set.
10. Let the cookies cool on the baking sheet for a few minutes before transferring them to a wire rack to cool completely.
* For a chewier cookie, chill the dough for at least 30 minutes before baking.
* For a crispier cookie, bake for a minute or two longer.
* You can decorate the cookies with frosting, sprinkles, or other toppings.
* Store the cookies in an airtight container at room temperature for up to 3 days, or in the freezer for up to 2 months.