1 - Preheat oven to 350 degrees F (175 degrees C).

2 - Grease a 9-inch pie dish.

3 - Place the brown sugar and butter in a mixing bowl, and beat them together with an electric mixer until creamy and very well combined, without lumps.

4 - Beat in eggs, one at a time, incorporating the first egg before adding the next one.

5 - Add the vanilla extract and salt; beat the flour in, a little at a time, and then the milk, making a creamy batter.