Mennonite Orange Muffins

Details

Ingredients

• 2 cups all-purpose flour
• 2 teaspoons baking powder
• ¼ teaspoon baking soda
• 1 teaspoon salt
• ½ cup white sugar
• 1 tablespoon grated orange zest
• ⅔ cup orange juice
• ½ cup melted butter
• 2 eggs
• ½ cup ground walnuts
• 1 tablespoon melted butter
• ¼ cup packed brown sugar
• ½ teaspoon ground cinnamon