Combine the flour, baking powder, baking soda and salt. Cut in the butter with a pastry blender or 2 knives until the mixture resembles coarse crumbs.
Beat the eggs with a fork in a small bowl. Add the sour cream and dried dill; beat until well combined. Stir into the flour mixture until the mixture forms a soft dough that pulls away from the side of the bowl.
Turn out the dough onto a well-floured surface. Knead the dough 10 times. Roll out the dough into a 9 x 6-inch rectangle with a lightly floured rolling pin.
Cut the dough into 6 squares. Cut each square diagonally in half, making 12 triangles. Cut again to make 24 triangles Place the triangles 2 inches apart onto ungreased baking sheets.
Bake for 8 minutes, or until a toothpick inserted in the center comes out clean. Cool on a wire rack for 10 minutes.
To build place a dollop of Horseradish Cream Sauce on each scone. Top with a sliver of smoked trout and fresh dill.
Notes
This recipe can be built by using cold smoked thin sliced salmon or trout, or Lox. I prefer hot smoked salmonwhich is a more flaky and drier, chunkier product and easier to bite into. The end result you see in the photos is the thinner cold smoked salmon, which is normally used for bagels and lox.