In a medium bowl, combine sugar, brown sugar, garlic and ginger
Whisk in soy sauce, cider vinegar and orange juice until well combined
Place trimmed chicken breasts in crock pot
Pour sauce over chicken
Cook on low for 4-6 hours or until internal temperature of chicken is 165 degrees
Remove chicken and set aside
Pour sauce into small saucepan
In a small jar with a lid, combine cornstarch and water, shake until well combined with no clumps
Heat sauce slightly, then slowly pour cornstarch mixture into sauce, whisking constantly
Cook while whisking until thick and heated, about 10 minutes
Slice or pull chicken and place in serving bowl
Pour sauce over chicken
Serve immediately with rice and vegetables
Store leftovers in refrigerato
Notes
This recipe can be made ahead - place chicken in a large resealable bag. Make sauce and pour over chicken. Place in the refrigerator overnight. Remove from the refrigerator 1 hour prior to placing in Crock Pot. Cook on low.