Master chocolatier Max Brenner was welcomed to the kitchen for the Savoury but Sweet Challenge. Unveiling two of his dishes � biscuit tuile nachos and an incredible chocolate burger � he explained that the cheflings had 80 minutes to follow his lead by creating dishes that look savoury but tasted sweet. The kids really pulled out all the stops, letting their culinary creativity shine; Jack came third with his spaghetti and meatballs dish, Zac second for his sweet pie and Indigo first with a mesmerising take on the traditional meat and three veg. The kids then enjoyed a MasterChef first � a slumber party – and were awoken the following morning by the booming laugh of Santa (who looked suspiciously like George). Unwrapping presents from under the tree, the kids found their core ingredients for a Christmas-themed Invention Test Challenge. Lily picked up two points for placing third in the challenge, Zac continued his impressive run by taking the runner-up spot, but once again Greta left the competition for dust as her peppered mushroom tarts secured another six points to maintain her lead in the competition.