blueberry streusel muffins

Ingredients For blueberry streusel muffins

• 1/4 c

  peacan pieces
• 1/4 c

  brown sugar, firmly packed
• 3 Tbsp

  all purpose flour, divided
• 2 Tbsp

  butter or margarine
• 1/2 c

  uncooked regular oats
• 2 c

  all purpose flour
• 1/2 c

  sugar
• 2 tsp

  baking powder
• 1/4 tsp

  baking soda
• 1/4 tsp

  salt
• 2 tsp

  grated lemon zest
• 3/4 c

  buttermilk
• 1/4 c

  vegetable oil
• 1

  egg
• 1 1/2 c

  fresh or frozen blueberries