Cut butter into the dry ingredients using a fork or hand-held pastry blender. When well blended, the mixture will have the look of crumbly sand.
Add the vanilla, eggs, and milk, mixing only long enough to blend the ingredients. *You do not want to begin to melt the butter into the flour mixture by over-mixing.
Turn the dough onto a lightly floured counter top or pastry board. Shape it into a round disc 8 inches across, slightly thicker in the center.
Using a long knife, cut the dough into eight even pie-shaped portions.
Place scones on a lightly greased baking sheet. Using a spoon, press a well into the wide end of each triangle, and fill the well with a spoonful of fruit jam.
Brush the exposed surface of each scone with the milk/egg mixture,
Bake for twenty-five minutes, until scones are a beautiful golden brown.