Blueberry Coffee Cake

Name: Blueberry Coffee Cake
Prep time: 20 min
Cook time: 30 min
Yield: 18
Cuisine: Canadian,
Ingredients: 1/2 cup (125 ml) firmly packed brown sugar; 1/2 cup (125 ml) flour; 2 tsps (10 ml) cinnamon ground; 1/2 tsp (2 ml) allspice ground; 1/3 cup (75 ml) cold butter cut into pieces; 1/3 cup (75 ml) butter softened; 1/3 cup (75 ml) granulated sugar; 2 eggs; 2 tsps (10 ml) pure vanilla extract; 1 1/2 cups (375 ml) flour; 1 tbsp (15 ml) baking powder; 3/4 cup (175 ml) milk; 2 cups (500 ml) blueberries