Best Blueberry Cobbler

The blueberries are forming on my bushes and it looks like another great harvest.  Meanwhile I still have a few bags of frozen blueberries to use up from last year.  I made this cobbler up for my sweetheart's end of the school year potluck.  It would be great for any occasion, even just a yummy dessert because you love your family.  This recipe came from the Wicked Kitchen blog.  If you want this to be more of a bar, just decrease the berries to 3 cups.

Filling:

• 6 cups fresh or frozen blueberries
• 1 cup  sugar
• 2 teaspoons  lemon zest
• 3 tablespoons  flour

 Topping

• 1 cup plus 5 tablespoons  flour
• 6 tablespoons sugar
• 1½ teaspoons baking powder
• ¼ teaspoon salt
• 6 tablespoons unsalted butter
• 1 egg
• 1 teaspoon vanilla
• 1 tablespoon sugar
• ½ teaspoon cinnamon
•  
• Combine all filling ingredients and place in a 11x7 inch pan.  Whisk together the topping ingredients:  flour, sugar, baking powder and salt.  Cut in the butter.  Make a well in the middle of the flour mixture.  In the well mix together the egg and vanilla.  Then mix the flour into the egg mixture, mixing just until it begins to come together.  Sprinkle over the blueberries in the pan.  Sprinkle the top with the T. of sugar and cinnamon.  Bake at 375 for 40-45 minutes.