Add the olive oil to a large pot on the stovetop over medium/high heat. Once hot, add the ground beef. Cook and crumble the ground beef, and then, once cooked through, stir in the taco seasoning.
While the ground beef is cooking, boil the pasta according to package instructions, then drain and set aside.
Add the shredded cheese, sour cream, and milk to the pot, and stir until smooth and melted. Whisk in the flour until evenly combined, and then let simmer on low heat until the sauce thickens, about 5 minutes, stirring and scraping the bottom of the pot occasionally.
Add the rinsed black beans and pasta to the pot, and stir to combine.
Top as you'd like, then scoop, serve, and enjoy!
