Wild blueberry muffins with key lime butter

This morning it's a race against the sun.  I got up early all bright eyed and eager to enjoy the day when, according to all reports, the heat is officially going to break.  Hmmm.  The sun is already awfully intense.  And after several days of record breaking heat you develop a sixth sense about these things...

But I've already determined to use the wild blueberries that I picked off a friend's bush last night.  The cultivated berries that M and I picked at the farm last week can't compare to these tiny tart wild ones.  No matter that the picking goes much slower from a wild bush; the berries are minuscule and don't hang out in convenient clusters.  Never mind that you have to swat Japanese Beetles and other buzzing competitors for your cup and a half of pure joy.  Didn't cross my mind that I was holding up dinner for the group while I hunted and pecked my way through this bush.  Wild blueberries will do that to me.  
The key lime butter?  Really just a ploy to distract from the fact that I'm making yet another batch of blueberry muffins.

Wild Blueberry Muffins

(adapted from Muffin Mania)

1 3/4 cups flour
1/2 cup sugar
3 tsp baking powder
1/2 tsp salt
1 1/2 cup wild blueberries
1/2 cup (1 stick) unsalted butter, melted
1 cup milk, buttermilk, or cream

1 egg

Combine the dry ingredients and blueberries in a bowl.  

Whisk together the wet ingredients and add to the dry, mixing only until blended.  

Scoop into 8 greased muffin tins.  Bake at 350 for about 25 minutes or until done.

While the muffins are baking prepare the Key Lime Butter.
Mash together 1 stick of unsalted butter with the zest  and juice of a few key limes.  (1 or 2 tablespoons) You can use as much or as little zest as you want, but add the juice sparingly---add only as much juice as your butter will absorb.
Plop the butter on a sheet of waxed paper and roll it up like a little log.  Twist the ends like a candy wrapper and chill till firm.  

By the time the butter had firmed up and I sat down to enjoy my breakfast there was a decidedly cool breeze coming through the kitchen windows that we've so desperately cranked open as far as they will possibly go.  Aaaaah,  isn't summer wonderful?