Cranberry Orange Muffins

Ingredients:

2 cups all-purpose flour
1 cup granulated sugar
1 tablespoon baking powder
1/2 teaspoon baking soda
1/2 teaspoon salt
1 cup fresh or frozen cranberries, chopped
1/2 cup chopped walnuts (optional)
1 large egg
1/2 cup orange juice
1/2 cup milk
1/4 cup vegetable oil
1 tablespoon orange zest
1 teaspoon vanilla extract
For the glaze:

1 cup powdered sugar
2-3 tablespoons orange juice