As Greg E. wrote in his answer, Cannizzaro reaction does not usually occur with ketones. However there are some instances where ketones give Cannizzarro products. From the Wikipedia page of Cannizarro reaction:
Certain ketones can undergo a Cannizzaro-type reaction, transferring one of their two carbon groups rather than the hydride that would be present on an aldehyde.
The paper [1] gives an instance of such reaction. A reaction from the paper is:
Here, the 3 H-atoms of the methyl group of acetophenone(1-Phenylethan-1-one) are replaced by F-atoms. Therefore, it is a ketone without any $\ce{\alpha-H}$. After nucleophilic attack by $\ce{OH^-}$ on the carbonyl carbon, the intermediate expels a trifluoromethyl carbanion, and forms a carboxyllic acid.
In the next step, the carbanion attacks another ketone molecule to form alcohol.
However, according to the paper these products are formed only when solid NaOH with DMF as solvent, is used. Hydrated form of the ketone (gem-diol) also exists in a significant amount in the product mixture.
References:
- Jiang, X.; Matsukawa, S.; Kakuda, K.; Fukuzaki, Y.; Zhao, W.; Li, L.; Shen, H.; Kojima, S.; Yamamoto, Y. Efficient synthesis of tetradecafluoro-4-phenylheptan-4-ol by a Cannizzaro-type reaction and application of the alcohol as a bulky Martin ligand variant for a new anti-apicophilic phosphorane. Dalton Trans. 2010, 39 (41), 9823. DOI: 10.1039/C0DT00539H.