I didn't read all the replies, but had to pipe in with my opinion. No hobby is worth your marriage! There is room to compromise, but for your sanity, it sounds like a break could be the best thing. Get caught up on your sleep, show your husband that he is more important than cake, and then start working out some compromises. Maybe less cakes, higher prices, a babysitter, something. I love making cakes, but I have been doing less and less, since I decided to put my family first, and indulging myself in cake making later.
It looks this is a minority opinion here but I share it.
What if the OP was telling us this:
My Dh just loves to build stuff in his garage. He has tools everywhere. Every night after dinner he goes out there and uses his tools and holy cow the mess. I'm so sick of seeing it.
And then he spends the entire weekend building furniture for all our friends. For FREE!! I can't even tell you how much money he's spent and I'm spending all my time watching the kids and he can't ever seem to find the time to help me with them or the stuff around the house because he's too busy building while I sit and watch tv alone.
How many of us would be all over her about getting her DH to cut back on the woodworking and get his butt in the house and help and she shouldn't have to put up with his behavior?
To the OP:
I'm not saying you should give up caking, but really - is your marriage worth it? Is it worth it to miss out on the time with your small kids? Together the two of you need to come to some sort of compromise. He shouldn't make you give up your hobby, but it's not okay for it to interfere with your household either. JMO