I started my business in pretty much just this way - I decided to make and sell some truffles to coworkers, friends and neighbors for Mother's Day, and got orders for 300 pieces. I did a few more casual sales like that before I decided to get serious and worked out a deal for a commercial kitchen and got my license, etc.
So if you're willing to take the risk that what you're doing is technically illegal (but nothing that anyone is going to pay much attention to if you're selling to friends of friends, etc) it can be an ok way to test the waters and decide if it's something you want to do more of.
If you decide to give it a try, make sure you price yourself right. Which will probably be higher than you think. Don't forget to figure out what packaging you are going to use and include that in your pricing - packaging is surprisingly expensive - up to a third or half of total costs! Also, if you decide to go legit at some point, you don't want to shock your existing customers by having to change your prices to something you can actually make money off of. A lot of people who start a hobby business have that problem - they're happy as long as they are covering costs, but that sets false expectations on the value of the goods. | 
