Tons of Choc-Chip Cookies

This is a brilliant recipe that I got from the 'Simple Savings' website. Well worth joining if you're not already a member - the newsletters are filled with helpful hints and tips to save dollars. It is supposed to make around 120 cookies - but we made our's pretty big so we got around half that amount. Of course you can make the dough and leave it in the fridge, then just make up a trayful as you need them - just like that mega-expensive cookie-dough you can get at the supermarket.
You need;- 500g butter or margarine, 1 tin of condensed milk, 1 cup sugar, 5 cups Self-Raising Flour.
You;- Heat the oven to 180 degrees celcius. Cream the (softened) butter and sugar. We just used raw sugar and I refuse to ever use margarine - butter isn't that expensive; and better to have 1 incredible tasting cookie than a dozen filled with 'reduced-fat' chemicals. Add the tin of condensed milk and the flour. Roll into equal-sized balls, place on baking sheet, flatten with fork or bottom of a glass. Press choc-chips into the top (this makes them go much further than throwing them in the dough mixture). Bake for 10-15 mins. Fills the house with the most incredible aroma - hurry up and hide or they won't last until it's back to school time...