The original recipe calls for roasted walnut oil; I used plain. The original recipe also calls for soaking the apples in brandy before using, which I imagine would result in an even more special cake, but not one that could be served to children. It's a regrettable omission, and if you want to add the brandy, soak the apples in ⅛ cup of it in step 2. Then email me and tell me what I missed out on - as though I can't guess.