"This coffee cake, moist and spicy, with a buttery streusel topping, is perfect with a cup of hot coffee or tea. The recipe, which comes from a ten-year-old Meghan Barron of Arnold, Maryland, is the grand prize winner in our 1993 WinterBake competition's junior division." King Arthur In a medium bowl, stir together flour, baking powder, soda and salt. Set aside. In a large bowl, beat together sugar and shortening till fluffy. Beat in egg and vanilla. Stir about half the dry ingredients into the sugar mixture. Mix in sour cream, then stir in remainder of dry ingredients. Mix in apple. Spread evenly in a lightly greased and floured 20 cm round pan. In a small bowl, mix nuts, brown sugar, butter and cinnamon till crumbly. Sprinkle over coffee cake. Bake in a 350 degree oven for 25 to 30 minutes, or until cake tests done. Serve warm.