Instructions :

Cream butter sugar and vanilla until light and fluffy
Add the eggs, one at a time and beat well.
Sift together the flour, baking powder, (and coconut if you are using it)
Add dry ingredients to the creamed mixture, folding to combine well.
Fold 3/4 cup chocolate chips.
Spread in a greased 9 inch square baking pan and bake for 40 minutes at 350 degrees F. (325 for glass bake ware)
Remove from oven and while still hot, sprinkle evenly over the top with 3/4 cup chocolate chips. Let stand for 5 minutes, then spread the melted chips evenly over the surface with the back of a spoon or an offset spatula.
Cool thoroughly before cutting into squares or bars.

Notes :

Note: the amount of leavening agents has been reduced from the original measurements first published in this recipe years ago. That’s based upon reports of the cookies falling in the centre when baked. I have omitted the baking soda completely and reduced the baking powder by 1/4 tsp.