1Heat oven to 400°F. Place foil baking cup in each of 10 regular-size muffin cups.
2In medium bowl, stir cupcake ingredients just until moistened. Spoon about 3 tablespoons batter into each muffin cup.
3Bake 12 to 15 minutes or until light golden brown. Immediately remove from pan. Cool 10 minutes.
4Meanwhile, in small bowl, beat softened butter and maple syrup with fork until well blended. Spread topping on each cupcake; sprinkle each with about 1/4 teaspoon salt.