Homemade Chocolate Pudding

I needed a good easy chocolate pudding recipe, ya know for those rough days! I only could find a good vanilla one that I liked. I also needed one that I didn't need to keep chocolate chips in the house cause we all know that chocolate chips don't last a New York minute in my house. I don't eat raw cocoa powder a lot so I thought that a recipe with that in it alone would be a safe bet! So at last the Recipe:

Ingredients:
1/2 cup white sugar
3 tablespoons unsweetened cocoa powder
1/4 cup cornstarch
1/8 teaspoon salt
2 3/4 cups milk
2 tablespoons margarine or butter
1 teaspoon vanilla extract

Directions:
In a saucepan, stir together sugar, cocoa, cornstarch and salt. Place over medium heat, and stir in milk. Bring to a boil, and cook, stirring constantly, until mixture thickens enough to coat the back of a metal spoon. Remove from heat, and stir in margarine and vanilla. Let cool briefly, and serve warm, or chill in refrigerator until serving.