6 tablespoons(3/4 stick) unsalted butter
1 cup packed light brown sugar
1 teaspoon vanilla
2 large eggs
¾ cup flour
1 teaspoon baking powder
(If desired, one cup of chocolate chips)
Preheat oven to 375 degrees. Coat an 8-inch square baking pan with
Nonstick oil spray(not olive oil). In a medium saucepan melt over medium heat, butter with brown sugar until smooth and bubbly. Remove from heat and let stand for 3 minutes, then stir in vanilla. Working quickly to prevent curdling, whisk in eggs. Stir in flour and baking powder to make a thick batter. If you are using chocolate chips, fold in .
Spread batter in prepared pan. Bake at 375 degrees until bars are rich golden brown, crusty at the edges, and just firm in the center. 22 to 20 minutes, check constantly, you do not want them to get hard. Let cool in pan for 10 minutes before cutting into squares.