Heat oven to 350 degrees F. Grease a 9- or 10-inch Bundt pan.
For Cake, combine flour, baking powder, baking soda and salt in a small bowl.
Beat softened butter, the brown sugar, granulated sugar and vanilla in a large mixer
bowl until creamy. Beat in eggs. Gradually beat in flour mixture just until incorporated.
Stir in 1 1/2 cups chocolate chips.
Spoon into prepared pan. Bake for 40 to 45 minutes or until a wooden pick inserted
in the center comes out clean.
Cool in pan 20 minutes. Invert onto wire rack to cool completely.
For Glaze, microwave remaining 1/2 cup chocolate chips, the corn syrup and 1
tablespoon butter in a medium-size microwave-safe bowl on HIGH for 30 seconds. Stir
until smooth. Microwave a few more seconds, if necessary, to complete melting. Pour
Glaze over cake.