Tried it as described. Doesn't taste good to me. 4 hours is too long to cook. Turns brown and tastes like molasses. Doesn't freeze solid. Use a spoon to get it out of ice cube tray. Stays on the bottom of the glass and melts then there is all the rhubarb pulp. Better off putting the cooked rhubarb in a jar and freeze or refrigerate and use as a spread on toast or english muffin.
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