Step 1- Pat the chicken thighs dry (with a paper towel), and then season with the salt, pepper, rosemary, and thyme.
Step 2-In large oven proof sauce pan, heat your butter.
Step 3- Once the butter begins to foam, add in chicken thighs, meat side down. Cook for about 3 minutes allow this side to brown.
Step 4- Remove the chicken thighs from the pan, add in your onions allow them to soften in the juice left behind in the pan and then deglaze the pan with your white wine.
Step 5- Once you've deglazed the pan, add in your chicken broth, allow it to simmer, and then add back your thighs. You want enough broth so that the juice comes right up so just the skin is sticking out.
Step 6- Allow this to simmer for about an hour, you can test one of the thighs to see if the chicken pulls apart.
Step 7 - To finish, take your pan and put in the oven and then broil it on high for about 1 or 2 minutes to allow your chicken skin to crisp up. Be careful, broiling is very finicky, I would check on this every 30 seconds to make sure you didn't burn the skin. Once the skin is crispy, enjoy!