Toss the shrimp in the seasoning mix and set aside.
Pre-heat a cast iron skillet for 2-3 minutes. That will allow it to get to medium-high heat.
Add the ghee or salted butter and allow it to coat the bottom of the pan. You know your pan is hot when the butter sizzles.
Add the shrimp and cook for 1-2 minutes per side. I used jumbo shrimp so they took 2 minutes per side. However, if you are using smaller shrimp then it will cook faster.
Notes
Spicy Fajita Low Sodium Seasoning: https://amzn.to/38X735R
Cast Iron Skillet: https://amzn.to/3gZIS9E