Sunday Brunch: Orange Butter and Buckwheat Pancakes

INGREDIENTS

• 4 tablespoons unsalted butter, softened
• 1 tablespoon packed brown sugar
• Zest of 1/2 orange
• 1 tablespoon orange juice (optional)
• 1 cup (4 1/4 ounces) whole buckwheat flour
• 3/4 cup (3 1/8 ounces) unbleached all-purpose flour
• 2 teaspoons baking powder
• 1 teaspoon baking soda
• 1/2 teaspoon salt
• 1 egg
• 2 tablespoons molasses
• 2 cups buttermilk
• 1 tablespoon unsalted butter, melted