Prepare the creamy adobo sauce by combining the sour cream, lime juice, and adobo sauce in a small bowl and whisking until creamy and smooth. Season with sea salt, to taste. Set aside to allow flavors some time to mingle.
Heat the black beans in a small saucepan over medium-low heat, then season with sea salt, freshly cracked pepper, garlic powder, and cumin to taste, until warm.
Cook the shrimp by heating the butter or olive oil in a large skillet over medium-high heat.
Add the shrimp and season with sea salt, freshly cracked pepper, cumin, oregano, paprika, chili powder, and garlic powder, to taste. Side Note: I didn't measure the seasoning; I just sprinkled a little bit of each onto the shrimp.
Cook for 2-3 minutes, then flip the shrimp and continue cooking for 1-2 minutes. Remove from heat.
Heat the tortillas by placing them on a gas flame for a few seconds on each side, or put them in a cloth dishrag in the microwave and cook for 30 seconds or until warm and pliable.
Prepare the tacos by layering the tortilla with black beans, green cabbage, creamy adobo sauce, cooked shrimp, avocado, tomatoes, green onions, cilantro, and cotija cheese.