Plum And Banana Purée PLUM AND BANANA PURÉE Sharp or acidic fruits like plums are not easily accepted by babies. But these fruits provide plenty of vitamin C and should be included in their diet. Adding some mashed banana tones down the sharpness of the plums and keeps both baby and you happy. Ingredients 3 ripe plums, peeled and deseeded 1 banana, peeled and deseeded 1 to 2 teaspoons sugar (optional) Method 1. Combine all the ingredients, blend in liquidiser and serve immediately.