How would I find someone to sell my snack desert?

After your copy write is legal and all the I's are dotted and T's are crossed, you would do best to contact food brokers. There are many and in turn have national accounts and branches servicing the entire U S. Their most reliable in store reps who are counters and fill-in order writers will get your snack into the mainstream and then you can move away to sell direct to the biggest retailers in the world.