lindsey's muffins

Can we take a moment and discuss these muffins? I'm flat-out obsessed with them.

They're made by Lindsey's Country Store in upstate New York by where I grew up, and no place else comes close. These muffins are super dense with huge, crusty tops that often topple right over. And they come in flavors like key lime, strawberries and cream, peach crumble, raspberry chocolate chip, coconut cream...

My parents visited a couple week ago, and brought up two whole dozen, which we are savoring slowly by freezing them. But what I really want to know is how to make a muffin like this. Ideas, anyone? Let's make these happen.