Butterscotch Nut Slice - Vegeterian

butter , for greasing the pan 2 tablespoons superfine sugar 1/4 cup butter , cut into cubes and at room temperature 1 egg , whisked lightly 1 cup plain flour[...]

1 cup sugar 1 cup firmly packed brown sugar 1 1/2 cups margarine or 1 1/2 cups butter , softened 3 eggs 4 1/2 cups flour 2 teaspoons baking powder 1 teaspoon[...]