Combine the tomato paste, distilled white vinegar, and water in a mixing bowl. Stir well until the tomato paste is fully dissolved.
Add the Worcestershire sauce, Dijon mustard, light brown sugar, molasses, onion powder, garlic powder, salt, black pepper, ground cinnamon, ground cloves, and cayenne pepper (if desired for heat) to the bowl. Mix thoroughly to ensure all ingredients are well combined.
Transfer the mixture to a small saucepan and place it over medium heat on the stovetop.
Bring the sauce to a gentle simmer, stirring frequently to prevent sticking and to incorporate all the flavors. Allow it to simmer for 10-15 minutes or until the sauce thickens slightly.
Remove the saucepan from the heat and let the sauce cool to room temperature. Once cooled, transfer the sauce to a sterilized jar or airtight container. Store it in the refrigerator for at least a couple of hours, or preferably overnight, to allow the flavors to meld together and intensify.
Your homemade copycat A1 Steak Sauce is now ready to be used. Serve it alongside your favorite grilled or roasted meats or burgers, or use it as a marinade or dipping sauce.