Position the oven racks in the top and bottom thirds of the oven and heat the oven to 375°F. Line two cookie sheets with parchment.
In a medium bowl, whisk the flour, salt, and baking powder until well blended. In another medium bowl, beat the butter on medium-high speed with an electric mixer (a hand-held works well) until smooth. Add the sugar and vanilla bean seeds or extract and continue beating until well combined, about 2 min. Add the eggs and beat until well blended, about 1 min. longer. Add the flour mixture and mix on low speed until just blended, about 30 seconds.
Using a 1-tablespoon cookie scoop or two tablespoons, arrange heaping tablespoonfuls of the dough in mounds about 3 inches apart on the prepared cookie sheets. Bake two sheets at a time, swapping the sheets’ positions half way through baking, until the edges are golden brown, 10 to 14 min.
Set the sheets on racks and let cool for 5 min. before transferring the cookies to the racks to cool completely. Using cooled cookie sheets, bake the remaining cookie dough.
Store the baked cookies in an airtight container at room temperature for up to three days, or freeze for up to a month.