Heat olive oil in a large skillet over medium-high heat. Season chicken breasts with salt, pepper, and paprika, then sear for 3-4 minutes per side until golden brown. This step locks in moisture and builds flavor—don't skip it even though it adds five minutes.
While chicken sears, whisk together honey, minced garlic, soy sauce, apple cider vinegar, and Dijon mustard in a small bowl. The mixture will be thick and aromatic, perfect for coating the chicken evenly.
Place sliced onions and carrots in your slow cooker, creating a flavorful bed. Add the seared chicken breasts on top, then pour the honey garlic sauce over everything. Pour chicken broth around the sides to ensure even cooking.
Cover and cook this cozy slow cooker honey garlic chicken recipe on low for 6 hours or high for 3-4 hours. The chicken should be fork-tender and internal temperature reaching 165°F—use a meat thermometer to verify doneness.
In a small bowl, whisk cornstarch with water to create a slurry. Remove chicken from the slow cooker, then stir the cornstarch mixture into the sauce. Cook on high for 10-15 minutes uncovered until the sauce thickens beautifully and coats a spoon.
Return chicken to the slow cooker and gently toss with the thickened sauce. Taste and adjust seasonings—add more honey if you prefer extra sweetness or soy sauce for deeper umami.