Cinnamon Buttermilk Waffles

Ingredients

• 1 stick butter, melted
• 2 cups flour
• 1/4 cup brown sugar
• 1 teaspoon baking soda
• 1 1/2 teaspoons baking powder
• 1/2 teaspoons cinnamon
• 1/2 teaspoon salt
• 3 large eggs
• 2 cups buttermilk
• 1 teaspoon vanilla