I have a recipe for a Cinnamon Swirl Cake that looks really good, but I'd like to use Toba Garret's Moist Yellow Cake and modify that instead of a boxed mix. Ingredients in the original recipe are as follows:

1 Box yellow cake mix
1 sm. box instant vanilla pudding
1 C water
1C veg. oil
4 Eggs
2Tbsp Cinnamon
6Tbsp. Br. Sugar

Now I know the box mix takes some water, oil and eggs, I just can't remember how much. I still want to try adding the vanilla pudding and so would expect to need some additional moisture. Probably in the form of some of the eggs and maybe some of the oil and water too.

The crux of the question: Does anyone know how much is left over after you account for the needs of the the box mix? I could probably add this with the pudding to the scratch recipe and have similar results. TIA!

Depends on the brand of the box mix, they vary.

Pudding mix shouldn't be added to scratch recipes as it results in a gummy cake. I would just use a regular vanilla butter cake recipe and add in the cinnamon and brown sugar.

Thanks for that advice. I probably would have made that mistake! I decided this time since I'm a bit time crunched I'll make the recipe as is, but I definitely prefer scratch (no I'm not trying to open the debate!) so I'll try it differently next time when I have more time to plan. Have a great day!