To make barbeque sauce at home, you will need tomato ketchup (1/3 cup), brown sugar (2 Tbsp), and apple cider vinegar (1/4 cup). For seasoning, you may use 1/2 teaspoon each of salt, black pepper, cumin, and smoked paprika.
Mix all the ingredients in a sauce pan & simmer for 3-5 minutes on medium-low heat. Or until it thickens to desired consistency.