Set a large skillet or medium Dutch oven over medium heat. Add the chopped bacon and cook, stirring occasionally, until browned and crisp and the fat has rendered, about 6–8 minutes. Use a slotted spoon to transfer the bacon to a paper towel–lined plate, leaving about 1–2 tablespoons of bacon fat in the pan. If there is more, spoon out the excess.
4 slices bacon
Add the diced onion to the hot bacon fat. Cook over medium heat, stirring occasionally, until the onion is soft, translucent, and starting to turn golden around the edges, about 5–7 minutes. If the pan looks dry or the onions brown too quickly, add a small splash of broth to loosen any browned bits.
1 small yellow onion, 1 cup low-sodium chicken broth
Stir in the minced garlic and cook just until fragrant, about 30 seconds. Sprinkle in the salt, black pepper, garlic powder, onion powder, and smoked paprika (if using). Stir to coat the onions and let the spices toast in the fat for another 30 seconds.
3 cloves garlic, 1 teaspoon kosher salt, 1/2 teaspoon black pepper, 1/2 teaspoon garlic powder, 1/2 teaspoon onion powder, 1/4-1/2 teaspoon smoked paprika
Add the drained green beans to the pan and gently stir so the beans are coated in the onion-garlic mixture. Pour in the chicken broth, then add the Worcestershire sauce and sugar. Stir again, scraping up any browned bits from the bottom of the pan.
3 14.5-ounce cans green beans, 1 cup low-sodium chicken broth, 1-2 teaspoons Worcestershire sauce, 1 teaspoon sugar
Bring the mixture to a gentle simmer, then reduce the heat to low. Cover and cook for 15–20 minutes, stirring once or twice, until the beans are tender and well flavored.
Remove the lid and stir in the butter until melted. Add 1 teaspoon of apple cider vinegar, stir, and taste. If you’d like a brighter flavor, add the second teaspoon. Adjust salt and pepper as needed. Stir in half of the cooked bacon, reserving the rest for topping.
4 slices bacon, 1 tablespoon butter, 1/2 teaspoon black pepper, 1-2 teaspoons apple cider vinegar
If possible, remove the pan from the heat and let the beans rest, covered, for 5–10 minutes to let the flavors settle. Garnish with reserved crispy bacon, chopped fresh parsley, and a sprinkle of red pepper flakes if desired. Serve warm.
4 slices bacon, chopped fresh parsley, red pepper flakes