Maple-Walnut Cupcakes

INGREDIENTS

• 2 3/4 cups all-purpose flour, sifted
• 1 tablespoon baking powder
• 1/4 teaspoon salt
• 1 teaspoon ground cinnamon
• 2 sticks (1 cup) unsalted butter, room temperature
• 1 1/2 cups sugar
• 3 large eggs
• 1 teaspoon pure vanilla extract
• 1 cup milk
• 1 1/2 cups (5 1/2 ounces) walnuts, chopped medium-fine
• Maple Buttercream
• Candied walnuts, optional