Blueberry Crumb Cake

Preheat oven to 350 F. Spray a 9 x 13 inch baking pan with cooking spray and set aside.

In a large bowl mix butter and sugar. Stir in eggs one at a time then stir in milk and vanilla. Set aside.

In a medium bowl sift flour, baking powder and salt. Gradually stir the flour mixture into the wet ingredients until combined. Fold in blueberries and walnuts.

Combine the crumb topping ingredients in a small bowl and mix together with a fork until you have nice crumbs.

Spread batter into the prepared baking pan and sprinkle with crumb topping. Bake for 40-45 minutes or until a cake tester inserted into the center comes out clean.