Is it possible to make a carrot cake in sheet pan 2" high?  My recipe turns out about 1 in high.  Need it much thicker

Do know how many cups of batter the recipe you used yields?  Depending on the size of the sheet pan you are using you might not have enough batter to fill the pan. Normally when I bake sheet cake I calculate the amount of batter the recipe yields. Then reference that number with the required cups of batter needed on the Wilton chart for a 2 in pan.

http://www.wilton.com/cakes/making-cakes/baking-serving-guide.cfm

And you already considered doubling your recipe to produce enough batter to make a 2" tall cake?  Is there a reason you believe that won't work?

Both recipes I tried said to use 9 x 13 pan.   The one from scratch was a little thicker but still not as thick as I wanted it.  I thought about doubling  but was afraid it may turn out too heavy.  I was playing around with a smaller version so I could calculate what it would take for two 12 x 18 pans.  Didn't want to experiment on that size.   Even though the one from scratch was awesome. Wouldn't mind having that around to nibble on for a few days.  Lol.  Since I posted my question, the cake has been changed to a German chocolate cake.  Good o" DH mix to the rescue on that.  Thanks for the suggestions.  

Liz