Dice the bacon into bite-sized pieces and add to a large, heavy bottomed pot over medium heat.
Cook the bacon until the fat has rendered and the edges are just beginning to crisp up. Add the onion and cook for 5 minutes or until soft and translucent.
Add the garlic and cook for 30 seconds more, until fragrant.
Add the flour, cajun seasoning, paprika, onion powder, garlic powder, and pepper to the bacon mixture and cook, stirring constantly, for 2-3 minutes.
Slowly pour in the broth, stirring constantly while scraping up any browned bits from the bottom of the pan.
Add the green beans and stir to submerge the beans in the liquid. Bring to a boil, reduce heat to a simmer and cover the pot. Simmer for 30 minutes.
Add the potatoes to the pot and stir to combine. Cover the pot and continue simmering for 25 minutes or until the potatoes and green beans are as tender as you’d like.
Remove the lid from the pot and simmer until the liquid has thickened and reduced, about 10 minutes.
Taste and add salt or additional Cajun seasoning, as needed.
Serve hot.