Baked Pancakes with Vanilla Sauce

1 cup all-purpose flour
2 tablespoons sugar
1 teaspoon baking powder
1/2 teaspoon baking soda
1/4 teaspoon salt
1 cup buttermilk
1 large egg
2 tablespoons melted butter
1 teaspoon vanilla extract
1 cup milk
1/4 cup sugar
1 tablespoon cornstarch
1 tablespoon butter
1 teaspoon vanilla extract

Directions