Blueberry Crumb Cake

INGREDIENTS

• 1/2 stick Butter
• 1 Tablespoon (additional) Butter
• 3/4 cups Sugar
• 1 whole Egg
• 1/2 teaspoon Vanilla Extract
• 2 cups All-purpose Flour
• 2-1/4 teaspoons Baking Powder
• 1/2 teaspoon Salt
• 3/4 cups Whole Milk
• 2 cups Fresh Blueberries
• _____
• FOR THE TOPPING:
• 3/4 sticks Butter
• 1/2 cup Sugar
• 1/2 teaspoon Cinnamon
• 1/2 cup Flour
• 1/4 teaspoon Salt