In a stand mixer with the paddle attached, mix the butter and sugar on medium to medium high until light and fluffy, about 3 minutes.
Reduce to low and add egg white and vanilla. Don't worry if the dough looks curdled.
Add the flour in 3 to 4 additions, mixing only until combined. Scrape the dough down as needed.
Remove the dough, flatten into a disc, wrap and refrigerate for at least an hour.
Roll the dough to fit a 9" tart pan.(I love this tart pan. It's the one I use) Trim. (Any leftover dough can be used to make cookies. Just roll out and bake at 350 for about 15 minutes)
Preheat oven to 375
Prick the dough with a fork. Line with parchment and add pie weights or rice or some manner of weight
Bake the preheated oven for 10 minutes, check, rotate and bake for another 5 - 10 minutes until the crust is golden brown.
Remove from oven and let cool.