Used different ingredients.
I used chopped pecans instead of walnuts and also substituted Low GI sugar (Logicane) for the sugar in both cake and topping. I am always on the lookout for recipes to suit my mildly diabetic husband and this was a winner in our house.
I also substituted some wholemeal flour for the white flour. This made for a denser cake but still delicous. Will use all wholemeal flour next time. - 12 Apr 2010
I will be making this recipe every time my rhubarb plants are ready for harvest (and here in the Australian Capital Territory my rhubarb often has a good crop in summer and early autumn too). This cake is delicous and although the topping will probaly lose some of its crispness I will be freezing rhubarb cake for later . - 12 Apr 2010