When we lived in Texas we shopped at Kroger. They had the best bran muffins. Back in my airline days, they were my go to breakfast. Portable, filling, perfect on a 15 minute break.
I like mine really plain. No raisins, no nuts, not too sweet, no crunchy topping and not too heavy. This recipe is very, very close. The addition of speculoos spice mix adds a subtile zing that you will miss if you leave it out. In a pinch substitute a bit of cinnamon. You can by all means add all that stuff if you like but I am a bran muffin purist. Make a batch over the weekend and keep them in the fridge for breakfast all week. I think they actually taste better after the first day.