The Queen's very own drop scone recipe has been revealed in a letter to a former American president.
In 1960, eight years into her reign as Queen, Elizabeth received a visit from then-President Dwight Eisenhower and his wife Mamie at her magnificent Balmoral estate in Scotland.
And it seems that the president was so delighted by the Queen's baking that she decided to share her very own recipe of the drop scones, also known as Scottish pancakes, that were served at the royal retreat.
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The Queen, aged 34 at the time, sent the president the recipe, along with some tips and a letter.
"Dear Mr President," she wrote. "Seeing a picture of you in today's newspaper, standing in front of a barbecue grilling quail, reminded me that I had never sent you the recipe of the drop scones which I promised you at Balmoral. I hope you will find them successful."
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Her royal recipe for scones for 16 is as follows: Beat together 2 eggs, 4 tbsps of caster sugar and 1 tsp of milk; add 4 tsps of plain flour, a second tsp of milk, two tsp of bicarbonate of soda and 3 tsps of cream of tartar.
"Finally, you should fold in 2 tbsps of melted butter ".
The queen – who didn't need the likes of The Great British Bake Off to get her rustling up her own royal treats at home – also included her personal baking tips.
"Though the quantities are for 16 people, when there are fewer, I generally put in less flour and milk, but use the other ingredients as stated.
"I have also tried using golden syrup or treacle instead of only sugar and that can be very good, too.
"I think the mixture needs a great deal of beating while making, and shouldn't stand about too long before cooking.
The letter is one of many - including personal messages written by Gandhi, Elvis Presley, Mick Jagger and Spike Milligan - to be published in a book called Letters Of Note by British author Shaun Usher.