I can't take the credit for this recipe it came from... it's not really $4 as it's old ans Oz prices are more but still for around $7

http://www.facebook.com/photo.php?fbid=241076812585094&set=pu.198360836856 692&type=1&theater

120 Biscuit Recipe

Make over 120 cookies for just $4.00! This fantastic basic cookie recipe is terrific value, makes loads and has lots of room for variations:

500g butter
1 tin condensed milk
1 cup sugar
5 cups self-raising flour

Cream sugar and butter. Add condensed milk and flour. Roll into teaspoon sized balls and press down with a fork. Place on greased trays and bake in moderate oven until golden brown (approximately 10-15 minutes).

Before baking I divide the mixture into five and add the following ingredients for different flavoured cookies:

1.Chocolate chips and glace cherries (chopped)
2.Cornflakes and sultanas
3.Hundreds and Thousands
4.Jam drops
5.Milo and coconut

You could add any number of other things like Rice Bubbles, Smarties, nuts, cinnamon and other spices and so on. The raw mixture can be frozen in balls, just thaw slightly before baking.

Make your own Condensed milk!

1 cup (250 mL)of water
2 cups (500 g) of sugar
2 cups (500 g) of powdered milk
6 tbsp butter

Place all ingredients in the blender and let it blend for a full two minutes. Bingo ... 'Condensed milk'
*extra hint: Use hot water and dissolve the sugar before adding the other ingredients.

Keep it refrigerated. Makes the equivalent to two tins and can be used in any recipe that calls for it.