Cake:
1/4 pound butter (1 stick, room temperature)
1 cup Sugar
3 eggs
1 teaspoon vanilla extract
1 1/2 cups unbleached all-purpose flour
1 teaspoon baking powder
1/4 teaspoon salt
1 package Earthbound Farm Frozen Organic Blueberries
 
  Crumb Topping:
1 cup unbleached all-purpose flour
1/2 cup (packed) golden brown sugar
1/2 teaspoon ground cinnamon
1/4 teaspoon ground nutmeg
6 tablespoons butter (melted)