BEST Blueberry Muffins...

I keep searching for the PERFECT Bluberry Muffin Recipe. 
This is My Current Favorite and are Great for Gifting.
 

 
Ingredients:
  • 2 1/2 c. all-purpose flour
  • 1 tsp. salt
  • 1 1/8 c. + 1/3 c. + 3 tsp.  sugar
  • 1 c. buttermilk
  • 2 eggs
  • 1/4 cup melted unsalted butter
  • 4 tblsp. veg oil
  • 1 1/2 tsp. vanilla
  • 1 c. + 5 oz. fresh blueberries, rinsed
  • 1 tsp. lemon zest
Topping:  Combine 1/3 c. sugar and lemon zest
"Filling":  Combine 5 oz. blueberries and 3 tsp. sugar in saucepan. Cook and reduce over medum heat, making to jam constitancy. Transfer to bowl and let cool.

 
Muffin:
Combine flour and salt; set aside.  In mixing bowl, whisk eggs and 1 1/8 c. Sugar together until blended. Whisk in buttermilk, oil and vanilla until blended (not whipped!). 
Fold in dry ingredients and 1 c. blueberries, until blended (batter should have "rough" consistance of a quickbread).
Spoon mixture into sprayed muffin pan. 
Put 1 tsp. of your newly-made filling into the middle of each; swirl this around to minx in (I do this with a chopstick).
Sprinkle topping over muffins.

 
Bake at 425° for 18 min., rotating pan at halfway mark.  [test doneness by tapping muffin top to be sure they're set]
Set on Rack to cool.
Remove muffins and enjoy!