I stumbled upon these when when my DS, who is now in lower secondary, brought a few buns that he baked in school. I was amazed that he can do some baking/ cooking on his own, as at home he rarely steps in kitchen. :P
Okies, so we tried them and liked them instantly. So I asked him to bake a fresh batch at home as well. " Ohh, its very simple recipe, lets make it " . He took out a printout of the recipe with the ingredients and its amount and viola, there was no butter/ margarine in the list. Other ingredients were sure out of proportion as well. :(

But since we loved the buns and he insisted the recipe is simple and need not to be so proportionate, I decided to google the recipe and try it. Upon searching I came to know that all lower secondary kids are taught to make rock buns to demonstrate the rub-in method. There is actually no specifics to the amount / ingredients used. Its depends upon your taste buds how you want to it soft , hard, crunchy, nutty ....
They got there name, as they are rough looking and hence dont soomthen them down.Rock buns are a specific type of pastry, distinguished by the hard, crust-like texture and sweet taste. Good Old Rock Cakes These were once economy cakes, not too expensive, providing cake for large families.

Ingredients:

200 gms ( 1 1/3 cup) All purpose flour
75-80 gms Melted Butter
75 gms Sugar
1 tsp Baking Powder
1/2 tsp Salt
1 Egg
75 gms Berries/ Raisins
1 Tbsp Milk 
1tsp Vanilla essence

Method:

1. Preheat the oven to 200°C/400°F and grease the baking tray
2. Sieve the flour in a large bowl
3. Pour melted butter over it and with hands rub the butter over the flour. All grains of the flour should be coated with butter and resemble breadcrumbs
4. Add sugar and dried fruit mix.
5. Finally add egg, milk , vanilla essence and mix thoroughly.
6. Using two forks, lift up small portions of the mixture and place on the baking sheet more than an inch apart.
7. Place the tray in the preheated oven for 10-15 minutes until golden brown. Leave it inside oven for about five more minutes, then transfer to a wire tray to cool.


Tips :

1.The buns need to be rough looking, do not smooth them down while placing them in baking tray
2. You may vary the ingredients / proportion , depending upon you like harder or softer buns.