Cook bacon. Preheat a cast iron skillet over medium high heat. Add the chopped bacon and cook until brown and slightly crisp, stirring occasionally (about 10 minutes). Remove the bacon to a plate lined with a paper towel and set aside.
1 pound bacon
Add onion. Add the sliced onions to the bacon fat in the pan, reduce the heat and cook, stirring occasionally, for 10-15 minutes until the onions are light brown in color and cooked through.
1 sweet onion
Add whiskey, brown sugar, and honey. Pour the whiskey into the caramelized onions and vigorously scrape the bottom of the skillet to release any stuck on bits. Sprinkle in the brown sugar, drizzle in the honey and increase the heat to high. Bring the mixture to a boil and cook while stirring for 1-2 minutes.
½ cup whiskey, ¼ cup brown sugar, ¼ cup honey
Add remaining ingredients. Pour in the balsamic vinegar, salt, and red pepper flakes. Cook 1-2 more minutes while boiling and stirring. Reduce the heat to a simmer and add in the cooked bacon. Cook for 6-7 more minutes, stirring occasionally, until the mixture is well combined, thick, and dark.
1 ½ Tablespoons balsamic vinegar, 1 teaspoon Kosher salt, ½ teaspoon red pepper flakes
Enjoy! Serve the bacon jam warm on crackers, on top of softened cream cheese, spooned onto a burger or grilled chicken breast. Transfer any leftover bacon onion jam to a lidded glass jar and store in the refrigerator for up to 5 days. Reheat slowly in the microwave before serving.