AITA For not tipping on a cake

Hi all. Long time lurker first time poster here. Here’s the deal, I recently put in a request for a custom cake from a nice bakery. I used their website instead of calling and when I got to the payment screen it asked me if I wanted to leave a tip. At first I thought that was bizarre (You don’t tip the people who cook your pizza right?) so I didn’t leave one. Later on I was thinking that maybe since it’s a custom order and baking a cake is more involved than making a pizza I should’ve tipped the baker. My friends are split 50/50 so I’ll leave it up to you reddit, AITA for not tipping on a nice custom made cake or nah?