Set a large pot over medium heat and add the bacon. Cook until crisp, stirring the pot to prevent sticking. Remove to drain on a paper-towel lined plate. Remove all but 2 tablespoons bacon fat in the pan. (You should have plenty and not need to add any extra oil.)
6 slices bacon
Add the onions and sauté about 5 minutes. If the onions are browning before softening, reduce the heat to medium-low. Stir in garlic powder, paprika, and salt, and cook briefly to toast the spices.
½ cup diced onion, ½ teaspoon garlic powder, ¼ teaspoon paprika, ¼ teaspoon fine sea salt
Add cabbage and stir well to coat in the fat and spices. Cook 10-15 minutes, until very soft and reduced in volume.
1 head green or purple cabbage
Stir in the reserved bacon, pepper, vinegar, and crushed pepper flakes. Taste and adjust seasonings, then serve.
Ground black pepper, 1 teaspoon cider vinegar, Crushed red pepper flakes