Butter and line with parchment paper an 8x8" baking pan.
Attach a candy thermometer to a bottom heavy saucepan. Add the sugars, butter ,honey, condensed milk, and sea salt. Place over medium heat.
Stir consistently until the temperature has reached 240F, or 245-250 for firmer caramels.
Add more salt to desired taste.
Pour the caramel into the prepared baking dish. Set aside to cool until firm enough to slice, about 2-3 hours. You can speed up the process by placing in the fridge.
Use a serrated knife run under cold water to slice into individual pieces. Sprinkles with flaky sea salt.
Wrap each individual piece in parchment paper. Store away from direct sunlight and heat at room temperature (on the counter) up to 3-4 weeks.