Hp Guinness Sauce - cooking recipe

Ingredients

18 ounces tomato paste
15 ounces tomato sauce
3 1/2 cups white vinegar
2 1/2 - 3 cups light brown sugar
28 ounces dark molasses
3 (11 1/4 ounce) bottles guinness draft beer
2 tablespoons onion powder
2 tablespoons garlic powder
3 tablespoons salt
1 1/2 tablespoons black pepper (powdered in spice or coffee grinder)
3/4 cup cold water
5 tablespoons cornstarch

Preparation

Dissolve the cornstarch in the cold water.
Add all ingredients to a large pot.
Bring to boil.
Simmer, stirring often for 2-1/2 hours on medium heat.
Bottle in sterilized glass bottles or jars while still very hot.
Refrigerate after opening.