They're certainly popular here in Sydney! You see ANZAC biscuits in every cafe or take-away these days. I've tried a few and none compare to the recipe with which I grew up. Mum's family ANZAC biscuits recipe dates back to World War I (1914 - 1918). They're easy and delicious to make.
1 cup rolled oats
3/4 cup coconut
1 cup (plain) flour
1 cup sugar
1/2 cup butter
1 tablespoon golden syrup
1 1/2 teaspoons bicarb of sda
2 tablespoons boiling water
Mix oats, flour, sugar and coconut.
Melt syrup and butter together. Mix bicarb of soda and boiling water, then add to the melted syrup and butter mixture.
Add the liquid mix to the dry ingredients.
Place dessertspoons of mixture on a greased baking tray. (I use a small flat dessertspoon not heaped as the mixture spreads considerably. Place the rounds of mixture well apart.)
Bake in a SLOW oven for 20 minutes. Leave biscuits to cool on tray 2 - 3 minutes before moving to a cooling rack.
Footnote: ANZAC Day is celebrated on 25th April.