blueberry streusel muffins

Ingredients For blueberry streusel muffins

• 1/4 c

  softened butter or maragrine
• 1/3 c

  sugar
• 1

  egg
• 1 tsp

  vanilla
• 21/3 c

  all-purpose flour
• 4 tsp

  baking powder
• 1/2 tsp

  salt
• 1 c

  milk
• 1 1/2 c

  fresh or frozen blueberries, (if using frozen do not thaw before adding to batter)
• STREUSEL TOPPING
• 1/2 c

  sugar
• 1/3 c

  all-purpose flour
• 1/2 tsp

  ground cinnamon
• 1/4 c

  cold butter or maragrine