Streusel-Topped Muffins

Details

Ingredients

• 2 cups all-purpose flour
• ½ cup white sugar
• 3 teaspoons baking powder
• ½ teaspoon salt
• ¾ cup milk
• ⅓ cup vegetable oil
• 1 egg
• ¼ cup packed brown sugar
• 1 tablespoon butter, softened
• ½ teaspoon ground cinnamon
• ¼ cup chopped walnuts