4 teacups* flour
4 tablespoons caster sugar (can use regular granulated sugar)
2 teacups* milk
2 whole eggs
2 teaspoons bi-carbonate (baking) soda
3 teaspoons cream of tartar
2 tablespoons melted butter
Beat eggs, sugar and about half the milk together, add flour, and mix well together adding remainder milk as required, also bi-carbonate and cream of tartar, fold in the melted butter.
Her recipe ends there, but seeing as these are similar to pancakes, one can then assume the batter would be dropped into a pan by the spoonful and flipped when bubbles started to appear on the surface.
*One teacup is approximately equal to half a cup.
Recipe from Queen Elizabeth II herself, via Town & Country