Pre-heat the oven to 185C.
Mix all the ingredients together to form a sticky dough.
Line a baking tray. Use a tablespoon to get equal amounts of mixture from the bowl and use your hands or the back of a spoon to form cookie shapes and place onto the tray.
Bake for 15 minutes and then leave to cool and they will harden.
*Apple puree can be bought at the supermarket- I get mine from the kosher aisle in Tesco. You can also get it in some baby food aisles. Alternatively, simmer chopped apples in a little water and blend them to make your own.
**You can also half the cacao powder for chocolate/vanilla/plain protein powder for protein cookies.