Combine the brown sugar, ketchup, teriyaki sauce, garlic, black pepper and sriracha in a bowl.
Pour the sauce over the chicken breasts and stir to combine.
Remove the chicken to a plate and turn your Instant Pot on Saute setting.
If your sauce is too thin, take ¼ cup of water and add 3 tbsp cornstarch, stir into a slurry. Add the slurry to the Instant Pot and cook until it thickens.