In medium bowl, stir together half-and-half, 2 tablespoons butter, the corn syrup, 1 teaspoon maple flavoring and 1/4 cup powdered sugar until blended and smooth. Slowly stir in 1 1/2 cups powdered sugar until blended. If necessary, stir in remaining 1/4 cup powdered sugar, 1 tablespoon at a time, until smooth and desired spreading consistency. For each cookie, spread about 1 1/2 teaspoons frosting almost to edge; let stand until set. Store in airtight container.