I have made this recipe twice - the first time I used store-bought buttermilk and although the mixture was quite wet and sticky, the scones were perfect and delicious! The second time I used homemade buttermilk left over from making my own butter. But I think I made a mistake and added the 500ml cold water used to "rinse" the butter to the buttermilk that came from the initial churning of the cream (there didnt seem to be very much buttermilk there - nowhere near enough to make a batch of scones, so I thought I was supposed to use the water too). The resulting buttermilk was very watery and thin, and the scones were flat and hard - although the ducks around our dam didnt complain In future I will stick to bought buttermilk - because that recipe was a winner!I make the butter milk scones quite frequently with the butter milk from the home made butter and have no problem. You usually get enough buttermilk from a large I think it is 600ml carton of cream to make the scones with.