This a nice easy recipe-no mixer!  The bars were gone in seconds at my house.
1 cup sifted flour
1 tsp baking powder
1/4 tsp salt
1/4 tsp ground cinnamon
1/4 cup butter, melted
1/2 cup brown sugar
1/2 cup white sugar
1 egg
1 tsp vanilla extract
1 cup chopped apple (any kind)

For topping:
1 TBS white sugar
1 tsp ground cinnamon

Preheat oven to 350.
Grease 9x9 inch pan.
Sift together dry flour, baking powder, salt and cinnamon. Set aside.
In a large bowl mix together melted butter, brown sugar, and 1/2 cup white sugar with a wooden spoon till smooth.
Stir in egg and vanilla.
Blend in flour mixture until just combined, then add apples.
Spread the mixture evenly in pan.
In a small cup stir together sugar and cinnamon for topping and sprinkle evenly over top.
Bake for 25 minutes in oven.  Cool in pan and cut into squares.

Great with a scoop of vanilla ice cream.