Salted Vanilla Toffee Cookies

unsalted butter, softened to room temperature

granulated sugar

packed light brown sugar (or dark brown)

large eggs, room temperature preferred

pure vanilla extract

seeds scraped from 1/2 of a vanilla bean1

and 1/2 cups (312g) all-purpose flour (measured correctly)

cornstarch

baking soda

salt

and 1/2 cups Heath English Toffee Bits 'O Brickle2

sea salt, for sprinkling