Squash Plants - Mashed Potatoes Quarter the carbs of potatoes! The squash plants ?Mashed Potatoes? is a bush type winter squash for larger patio containers and the open ground. This squash plant will produce acorn-type squash with white skin and almost white flesh. 450-700g fruit mainly produced at the crown of the plant. This unique squash resembles mashed potato when cooked and fluffed. Only 23 calories per serving compared to 110 calories from whole potatoes, also almost ¼ the carbs of potatoes too!