I used an Icewater bath too, kinda my mixer has a bowl lift so I slipped a pan under the bowl amd filled it with Icewater. I have made two batches one came out a really good and fluffy for that one i just used shea oil and shea butter. I made a second one using ako and cornstarch also and that one came out a lot harder. I found for both of them that they really didn't increase in volume. Do you guys see an increase in volume ? I think thats what made me think I didn't whip it enough.