I found this recipe from my Food & Nutrition Recipe books from my secondary school days. It's still as tasty as I remembered!

Cheese Crisps
Ingredients
150g plain flour
1/2 tsp baking powder
50g butter
80g cheddar cheese, grated
2 eggs, beaten
2 tbsp water

1. Preheat oven 190 degree celsius.
2. Sift flour and baking powder together.
3. Rub butter into flour.
4. Add 3/4 of the grated cheese and mix well.
5. Add 1 beaten egg and water and make to a pliable dough.
6. Knead on floured board till smooth.
7. Roll out dough to 1/3 cm thick, cut into neat squares.
8. Brush with remaining egg, prick and sprinkle with cheese.
9. Transfer squares onto baking sheet, put to bake for about 15 mins or until golden brown.
10. When baked, remove and leave to cool.