Good-Cooking - Glazed Tollhouse Cake

Ingredients

• 2 1/3 cups all-purpose flour
• 1 1/2 teaspoons baking powder
• 1/2 teaspoon baking soda
• 1/2 teaspoon salt
• 1 cup (2 sticks) butter or margarine, softened
• 1 cup firmly packed brown sugar
• 2/3 cup granulated sugar
• 2 teaspoons vanilla extract
• 4 eggs
• 2 cups (12 ounces) semisweet chocolate chips, divided
• 2 tablespoons light corn syrup
• 1 tablespoon butter or margarine