1/4 cup plus 2 tablespoons sugar
2 tablespoons cornstarch
2 cups whole milk
1 cup bittersweet chocolate chips
1 tablespoon unsalted butter
1-1/2 teaspoons vanilla extract
Whisk 1/4 cup sugar, and cornstarch in heavy medium sauce pot. Gradually whisk in milk. Whisk over medium heat until mixture boils and thickens, 3 to 4 minutes. Remove from heat. Whisk in chocolate chips, butter, and vanilla extract until smooth. Cover and chill pudding until cold, about 2 hours.