Homemade Chocolate Syrup

Great to make hot fudge sundaes, milkshakes, or to use in brownies.
In a quart casserole, combine 1/2 cup sugar, 1 Tablespoon baking cocoa, 2 1/2 teaspoons cornstarch, and 1/2 cup water until smooth.

Cover and microwave on high for 2 minutes, stir, microwave on high 2 more minutes.

Stir in 2 Tablespoons stick butter or Smart Balance and 1/2 teaspoon vanilla extract until blended.