Arrange 7 1/2 graham cracker sheets in the bottom of a 13 x 9-inch baking dish coated with cooking spray. Combine 3 cups milk, pudding mix, and cream cheese in a large bowl, and beat at low speed of a mixer 1 minute or until thick. Fold in whipped topping. Spread half of the pudding mixture over graham crackers, and top with 7 1/2 graham cracker sheets. Repeat the procedure with the remaining half of pudding mixture and 7 1/2 graham cracker sheets.
Combine 1/4 cup milk, softened margarine, honey, and unsweetened chocolate in a medium bowl, and beat well with a mixer. Gradually add powdered sugar to milk mixture, and beat well. Spread chocolate glaze over graham crackers. Cover dessert and tent with foil; chill 4 hours.