This pineapple upside-down cake is given a festive twist with the addition of gingerbread spices. The Thermomix makes it easy to mix the batter, and the cake bakes up perfectly every time. The pineapple rings and brown sugar topping add just the right amount of sweetness, while the gingerbread spices add a delicious warmth. Serve warm with a scoop of vanilla ice cream for a dessert that's perfect for the holiday season.