Streusel-Topped Muffins

Ingredients (11)

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