2cuppacked brown sugar NOT demerrara. Best is Domino's dark brown or similar
2teaspoonvanilla
2eggs
1 1/2cupall-purpose flour
2teaspoonbaking powder
3/4teaspoonsalt
1/2cupchocolate chips optional
Instructions
Heat oven to 350°F/175°C. Mix brown sugar and oil. Add vanilla and eggs. Stir in remaining ingredients. Spread in 9x13 pan. Bake 30 minutes. Cut into about 2-inch squares while warm.
(Note: I don't always cut while warm. If baked just right it doesn't matter but a bit too long in oven and they will harden a bit when cool making it harder to cut).