First, ensure all your ingredients are measured and within arm's reach. This will make the process easier and more efficient.
In a small saucepan, combine the ketchup, BBQ sauce, and hot sauce.Place the saucepan over medium-low heat, stirring occasionally to prevent the sauce from sticking to the pan.
As the sauce begins to warm, mix in the apple cider vinegar. If you prefer a milder vinegar sting, you can substitute white vinegar or use a combination of both.
Add the paprika, brown sugar (or maple syrup), ground black pepper, and salt to the saucepan. Stir well to ensure the dry ingredients are thoroughly incorporated into the sauce.
Allow the sauce to heat up slowly, stirring occasionally. This process should take around 4-5 minutes.
Once the sauce has thickened, remove the saucepan from the heat. Your Chicago Mild Sauce is now ready to serve!