I am developing a line of muffins to sell at a local farmers' market and possibly for distribution in a few regional stores. I have a lot of flavor ideas but my issue is developing a recipe that is 100% my own. To give a little background, I am a pastry school graduate. I currently sell muffins, among other items, at a local farmers market. The recipes I use for my farmers market muffins are either directly from a cookbook or I take the base cookbook recipe and change the flavors (e.g., a cookbook recipe for a raspberry muffin becomes a blueberry muffin).
I want to have recipes that are my own but at the same time I wonder if I am just reinventing the wheel if I spend time trying to figure out ratios and measurements (specifically those for flour, sugar, butter/oil, leaveners). Anyone have tips on how to approach this issue?