Ok, not the one I was thinking of. I'm in the Lab now, so I'll find the recipe that may offer the clues to solve the Blueberry Muffin problem. Either Cherries Jubilee or Dragon's Blood both use Vanilla Cupcake. The Jubilee:
Cherries Jubilee
Cherry - 2%
Cotton Candy - 6%
Vanilla Cupcake - 4%
Bavarian Cream - 4%
Jamaican Rum - 4%
Trying to translate this to a blueberry muffin, I would try the following:
Blueberry Extra - 4%
Blueberry Candy - 3%
Vanilla Cupcake -5%
Bavarian Cream -4%
Cotton Candy - 4%
Cinnamon Danish - 1%
Cinnamon Sugar Cookie - 1%
Acetyl Pyrazine - 1%
Disclaimer: I have not made this recipe! This is a suggested starting point as requested by OP. Starting here, I would adjust to taste with 100DT's until it was locked in!
I would also try some non-TFA flavorings as well. Sorry! Try TFA Banana Nut Bread, LA Cream Cheese Icing, DIY Flavor Shack Blueberry Muffin, TFA Cinnamon Sugar Cookie, and Capellas Blueberry Cinnamon Crumble. If I had all these flavors, I would try something like a 20% mix of Blueberry Muffin, Sweetener, Blueberry CinCrumble, Blueberry Extra, and possibly Blueberry Candy. I would caution you to check out the combination of Blueberry Extra and Blueberry Candy carefully. These blends often work, but not always, so check it out. Okay, that's my two cents.