Take a large bowl put a flour into it.. baking powder and salt and set aside

In a very large mixing bowl beat the butter and sugar with electric mixer on medium speed until mixture is well combined

Beat in eggs. Stir blueberries into flour mixture. By hand stir blueberries mixture into butter mixture.

Stir in milk just until combined. Spread batter in prepared pan

Bake in a 325 degrees F oven for 60 to 70 mintues..

Remove cake from pan; cool completely on wire rack.