Preheat the oven to 350℉. Lightly grease a 9x13-inch pan.
Mix together melted butter, brown sugar, and granulated sugar until smooth. Add eggs and vanilla extract. Mix until smooth.
Press dough into the prepared pan.
Bake until the edges are golden brown, about 30 minutes.
Cool and cut into bars. Store bars on the counter wrapped for up to five days. Or place in a freezer container and freeze for up to three months.