Not exactly a cobbler, because it has no topping. Slightly modified from Jane Brody's Good Food Book.
2/3 c. flour
1/2 c. sugar
1-1/2 tsp. baking powder
1/4 tsp. salt
2/3 c. milk
2 Tbsp. butter, melted
3 c. fresh blueberries, washed and picked over.
Whisk dry ingredients together in a medium bowl. Add milk and mix until smooth.
Pour melted butter into a 9x12 baking dish. Pour the batter on top, then cover evenly with the blueberries.
Bake at 350 for 40-45 minutes, or until lightly browned.