Trying to make a birthday cake for our Bible study group. Bought a large cake pan (12 x 15). Doubled the recipe, cooked according to directions. I didn't rely solely on the time given, but checked with a toothpick a couple of times. Tried twice; both times the cake wasn't done in the middle when the outside was. Once was using boxed cake mix (2) and one from scratch. I sooo want this to work. Any advice?
Yes, I use baking nails. I would use 2 for that size to help cook the middle.
I start my cakes at 350 degrees f because that is how the baking powder is designed to work best -- and when the cake gets to that point were it's not done in the middle all you have to do is add a loose foil tent over the cake -- crease the foil down the middle and set it on top -- and turn the temp down 25 degrees -- then wait 10 mins or so -- turn it down another 25 degrees if necessary and just wait it out -- leave the foil on after you remove it from the oven -- should be fine
We all have different ways I found baking at 300 degrees for a longer time works best for me It results in a moist cake That size should take about 1 hr Using flower nails will help but I have baked 100s w/o them Maybe your oven isn’t right on temp or maybe you should lower the rack
and if you have a cake that gets real brown on the edges -- slice those off as soon as possible so the rest of the cake's moisture doesn't get squandered in those brown edges -- to preserve the moisture in the rest of the cake -- you can also use some simple syrup splash in the cake too -- does best after freezing it -- the moisture levels disperse throughout there and it's better --
I use baking nails in all of my cakes larger than 8". For a sheet cake that size, I would use four nails and I would also back long and low.