Preparation

1. Preheat oven to 350°F and line 2 baking sheets with parchment paper. Set aside.
2. In a large bowl, whisk together the flour, baking powder, baking soda, and salt. Set aside.
3. In a small bowl, whisk together the vanilla and buttermilk. Set aside.
4. In a large mixing bowl, beat the butter and sugars on medium speed with an electric mixer on medium speed until fluffy.
5. Reduce speed to medium-low and add eggs one at a time, mixing in between until combined.
6. Slowly pour in buttermilk mixture. Reduce speed to low and add flour in three increments.
7. Drop cookies in 2 tablespoon portions 2 inches apart. Bake until edges are just golden brown, 9-11 minutes. Let cool on baking sheet 10 minutes before moving to a wire rack to cool completely.
8. While cookies cool, make the glaze:
9. In a saucepan over low heat, melt the butter and brown sugar, stirring constantly. Once melted, stir in salt and buttermilk. Remove from heat and add powdered sugar 2 tablespoons at a time until desired consistency is reached. Let cool until thickened and spread or drizzle over cookies. Enjoy!