Combine all ingredients in a heavy duty freezer bag. Add chicken breasts and turn to coat in marinade.
Fridge: Marinate the chicken in the fridge for 2-24 hours.
Freezer: If freezing, place in the freezer immediately. Thaw in the fridge overnight, or by immersing the bag in a bowl of cold water for a couple of hours.
Heat oven to 425°F. Bake chicken in a shallow baking dish for 10 minutes, flip over, then bake for another 10-20 minutes.
For 5-7 oz chicken breasts, bake for 20 minutes total. For 10 oz and larger chicken breasts, bake for at least 25 minutes.
Allow chicken to rest at room temperature for 5-10 minutes before slicing.
Note: This marinade has a bit of a spicy kick. Feel free to reduce the cayenne for a less spicy version. Serve with mango!