Put flour, sugar, baking powder and salt in large bowl. Cut or rub in butter until crumbly. Make a well in the center.
In another bowl beat egg until froth. Mix in milk and vanilla. Pour into well. Stir just enough to moisten. Pour into greased 8 x 8 inch cake pan. Push apples well into batter close together.
TOPPING: Mix brown sugar and cinnamon together and sprinkle over top. Bake in 350°F oven for 50 to 60 minutes until it begins to shrink from edge of pan. I baked for 50 minutes. Serves 9 or in my house 3 Ukrainians.