In a small saucepan, combine water, corn syrup, and sugar.
Set the saucepan over medium heat and stir until the sugar dissolves completely. This mixture forms the base of the Bronco Berry Sauce.
Add salt, garlic powder, paprika, cayenne pepper, onion powder, and white vinegar to the saucepan.
Incorporate diced red bell peppers and jalapeno peppers into the mixture. Adjust the amount of jalapeno peppers to your preferred spiciness level.
Sprinkle pectin powder into the saucepan while stirring continuously. Pectin helps thicken the sauce.
In a separate small bowl, mix cornstarch with a little water to create a slurry.
Gradually add this cornstarch mixture to the saucepan while stirring. Continue stirring gently to prevent lumps.
Cook uncovered over medium-high heat, bringing it to a full boil while stirring continuously.
Reduce the heat and simmer for 5-7 minutes or until the sauce thickens to your preferred consistency.
Once it reaches the desired thickness, remove it from the heat and allow it to cool for about 10 minutes.
Add red food coloring to achieve the classic vibrant red color associated with the Arby's Bronco Berry sauce. Stir well to distribute the color evenly.