Can you mix it with something to give it a softer consistency? It really doesn't matter what because this is not the period of time you worry about calories...this is your healing phase. If you can get it a little looser I think it would be fine. Peanut butter is a little difficult to swallow normally, so I'd think it might give you a problem just after surgery...but who knows.
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Kacee 
Dr. Hadar Spivak, Houston Banding: 05-23-07, High225/Surgery218/135/140 1st Fill 06/21/07 - Total 1.8cc, 2nd Fill 06/27/07 - Total ~2.2cc 3rd Fill 07/31/07 - Total 2.8cc, 4th Fill 09/06/07 - Total 3.1cc 5th Fill 12/05/07 - Total 3.3cc, 6th Unfill 03/20/08 - (1.3 out) Total 2.0 cc 7th Fill 04/03/08 - Total 2.5 cc, 12/30/08 Unfill to 1.5 | 