A note about rose water. The potency of rose water varies widely from brand to brand. This cake should be light on the rose scent. In my opinion, more than that and it tastes like you’re eating perfume– yuck. The brand I used in this recipe is Nielsen Massey, which I have found to be much stronger than other brands. If you’re not sure how much to add, do a little at a time (about 1/2 a teaspoon) and taste the batter as you go.