Coffee Cake Muffins - For the Muffins:1½ cups all-purpose flour½ cup brown sugar2 teaspoons baking powder1 teaspoon cinnamon¼ teaspoon baking soda¼ teaspoon salt¾ cup strong brewed coffee, chilled or ¾ cup milk⅓ cup canola oil1 egg¼ cup raspberry preserves For the Topping:¼ cup all-purpose flour¼ cup brown sugar¼ teaspoon cinnamon3 tablespoons cold butter, cut into small cubes¼ cup walnuts, finely chopped For the Vanilla Glaze:½ cup powdered sugar1 tablespoon milk½ teaspoon vanilla