Good-Cooking - Cinnamon Coffeecake

Ingredients

• 1/4 cup margarine
• 3/4 cup granulated sugar
• 1 egg, slightly beaten
• 1 1/2 cups flour
• 2 teaspoons baking powder
• 1/2 teaspoon salt
• 1 cup milk
• 1 teaspoon vanilla extract
• 1 cup brown sugar
• 3 tablespoons flour
• 2 teaspoons cinnamon
• 4 tablespoons margarine
• 1/2 cup walnuts or pecans, finely chopped