Step 1

In a medium saucepan, whisk together tomato sauce, water, 2 tablespoons white vinegar, hot sauce, sugar, salt, garlic powder, onion powder and cumin. Bring to a boil and then reduce heat to low or medium low. Simmer where the sauce is steadily bubbling for 15 minutes.

Step 2

After 15 minutes, stir the cornstarch into 1 tablespoon water in a small bowl until dissolved. Add the cornstarch slurry to the taco sauce and cook for an additional 1 minute, stirring constantly, until the sauce becomes thick and glossy. Remove from the heat and stir in the additional 1 teaspoon vinegar. Store refrigerated; it will thicken even more as it cools.