Prepare a glass 13 x 9 inch cake pan. Crush entire package of chocolate cookies in a plastic freezer bag until crushed coarsely. Pour into pan and add melted butter. Mix and press into bottom of pan for crust.
Next layer is 1 box of chocolate pudding made with 2 cups milk. Before pudding sets, pour over crust mixture and spread evenly.
Next layer is another box of pudding made with only 1 3/4 cup milk. When milk & powder are blended, fold in 1/3 of the tub of Cool Whip until mixed thoroughly. Pour over other pudding layer and spread evenly.
The top layer is made with the remaining Cool Whip and fold into it the peanut butter (melt in microwave about 20 seconds to make it easier to blend) until mixed well. Pour that over previous layers and spread evenly. Top with BAKER'S® Chocolate Chunks (optional).