The Little Cat and the Greedy Old Woman by Joan Rankin

The story revolves around a little cat who one day is unceremoniously shooed out into the pouring rain after he attempts to gain a taste of a special roast dinner the "greedy old woman" has prepared. The anger which grows inside him causes him to grow into a great jungle tiger tyrant and he reenters the house hell-bent on revenge. The moggy is a lovable villain and the  muted softer watercolours used for the house and the old woman are contrasted with the vibrant oranges and browns used for the terrifying tiger cat. An amusing read.