Heat the skillet with the butter and olive oil over medium-high heat.
The skillet needs to be extremely hot before adding the salmon.
Place the skin side down into the hot skillet for about two to three minutes.
After seasoning the top of the salmon, flip it over for three to four minutes.
It will be 1/3 to 1/2 way done which you will be able to see on the side of the salmon.
At this time I peel off the skin.
After peeling the skin off, add the blackening seasoning to the top side of the salmon you took the skin off.
Flip the salmon over and cook for two minutes.
If you like leaving the skin on, season it before placing it down in the skillet.
Cook each side three to four minutes.
The time you cook the salmon will vary depending on how thick it is and how pink you like it.