Buttermilk substitute

Many American recipes call for buttermilk in cakes and muffins but if I can’t be bothered looking for it around Brighton (Infinity Foods is a good source) I can always make my own:

Recipe:

• 1 cup minus 1 Tbsp of whole milk
• 1 Tbsp lemon juice or vinegar
• Let stand for 5 minutes

Let stand for 5 minutes and voila!