I have a Jubliee bundt pan that is only 10 cups, but my recipe is for a bundt pan at least 12 cups.  I've only made the recipe once and it turned out great.  But since I insisted in using as much of the batter as would fit in the pan, it overflowed while baking.  I cut the overflow off and ate it separately, but I'd like to make it next time where it doesn't overflow.  Since the recipe uses a box mix as the base and alters the ingredients you add, it's not a good idea to cut the recipe by 1/4 (not only would I have to figure out what 3/4 of the box mix would be, I'd have to use 3/4 of an egg!).  My thought is to make the batter and the filling but only use 3/4 of it for the bundt pan.  Any thoughts on what size pan or how many cupcakes I could make with the remaining batter?  You can find the recipe here:  http://allrecipes.com/recipe/chocolate-irish-car-bomb-cake/ 
You can use this for 'left-over' batter, or a whole batch:  An Ice Cream Cone:   