I make a couple of Christmas cakes every year, using this recipe: https://helgavan.com/easy-christmas-cake-recipe/
Usually I make two smaller cakes by splitting the recipe in half and baking them both in the oven at the same time (for less than in the given recipe).
This year I don't have a very big oven. It'll only be able to fit one of the two half-cakes. Is it ok if I leave the other half of the batter to sit while the first one bakes? What's the best way of storing it for this time?