Pretty much the headline.
Hello by the way :)
You can do that on ELR
Create an account and add your flavors making sure to choose the right ones. You'll need to create an account first. I search for flavors then sort by number of recipes it is used in and add the most popular with correct vendor to "my stash". After you fill your "stash", there is a "what can I make" button.
I was about to mention how shitty the site was, but it looks like they either had people putting up a lot more flavors or they turned down the restrictions on flavors. (like having a list of 50 different brands of strawberry and only 1 works for a specific flavor) It still needs a lot of work, but it's getting better.
People still need to use the exact same flavor names, for the "What can I make"-feature to work. But if you do that, it works fine :)