Chocolate chips blondies

Ingredients
Brown sugar 1 ½ cup
Butter 4 ounces melted
Eggs 2 lightly beaten
Vanilla 1 tsp
Flour 1 ½ cup
Chocolate chips 1 cup
Method
In a large bowl beat brown sugar, butter, eggs and vanilla until just blended, combine the flour, baking powder and salt, add to brown sugar mixture, stir in chocolate chips, spread into a well greased 13*9 inches baking pan, bake for 20 minutes, remove, cool on wire rack and cut into bars.