Preheat the oven to 350°. Line a 9 x 13 baking pan with parchment or spray it well with Pam.
Beat the butter and sugar until fluffy.
Add eggs, one at a time, and then add the vanilla. Scrape the bowl to be sure all of these ingredients are well-mixed.
Mix the flour, baking soda and salt together. Then add this to the wet ingredients above. Mix on low just until the ingredients are blended. Don't over mix.
Put the dough into the 9 x 13 pan and press it in evenly to form a crust.