Mix flour, sugar, baking powder and salt in a bowl,
cut in 2 sticks soft butter.
Beat eggs, vanilla and milk in a separate bowl.
Combine both mixtures.
Add 1 cup floured blueberries.
Stir till blended.
Place in buttered and floured large pyrex dish. 8"X12"
Spread topping over batter
Bake in a 350º oven for 35 MINUTES