Sift together cake flour, baking powder, sugar replacement, and salt.
Add dates and walnuts.
Slowly add water and stir to make a soft dough.
Spread in well greased 8 in. (20 cm) sq. pan.
Bake at 350°F (175°C) for about 40 minutes.
Score into 1 in. (2.5 cm) squares while warm.