Even after cutting all of the cranberries, this is one quick-to-make treat. Although it tends to vanish just as fast, it keeps very well if permitted to hang around a bit.
Heat oven to 350º.
In a large bowl, whisk together 2 cups sugar, flour, baking powder, and salt.
In a second bowl, combine eggs, oil, milk, and vanilla.
Whisk egg mixture into dry ingredients.
Stir in cranberries and walnuts.
Turn into a prepared 9x13x2-inch pan.
Sprinkle top with remaining sugar. Bake 40 minutes, or until golden-brown and pulling away from sides. Let cool in pan; then cut into 2-inch squares.