Pat the chicken thighs completely dry using paper towels—this matters because moisture prevents browning. Heat olive oil in a large skillet over medium-high heat until it shimmers, about two minutes. Working in batches so you don't crowd the pan, sear the chicken skin-side down for four minutes until golden and fragrant. This step builds flavor. I'll admit I used to skip this, and the result was noticeably flatter tasting.
Transfer the seared chicken to your slow cooker, skin-side up. Combine the minced garlic, grated ginger, honey, soy sauce, lemon juice, salt, pepper, and dried thyme in a small bowl. Whisk until the honey dissolves into the other ingredients—this prevents clumping at the bottom of the slow cooker later.
Pour the broth around (not over) the chicken so the skin stays exposed. Then pour the honey-garlic mixture evenly over the top, letting it pool slightly in the center. The exposed skin will crisp during cooking instead of steaming, which keeps texture intact. Cover and set to low for four hours, or high for two and a half hours if you're short on time.
After two hours on low, check the internal temperature at the thickest part of a thigh—it should read 165°F. At this point, Mia usually starts asking when dinner will be ready, and I know we're almost there. The kitchen will smell so good you might be tempted to open the lid repeatedly. Resist this because each opening releases steam and adds 15 minutes to cooking time.
Once the chicken reaches temperature, the thighs should shred easily with two forks. The glaze should coat everything with a rich, syrupy consistency that clings to each piece. If the liquid looks too thin, remove the chicken and set it aside. Switch the slow cooker to high, cover, and let the sauce reduce for 10-15 minutes until it thickens slightly. This concentrates all the flavors.
Return the chicken to the slow cooker and toss gently with the reduced sauce. Taste and adjust seasoning—most slow cooker honey garlic chicken cozy dishes need a pinch more salt at this stage because slow cooking mutes salt's impact. Garnish with sliced green onions just before serving so they stay crisp and bright against the tender meat.