Heat your skillet over medium-high heat. Add the oil to the pan and heat it for a few seconds as well.
Add in your chicken chunks, then the spices on top. Let it cook for just a minute or so, then mix. I like to let the bottom of the chicken sear before mixing.
Continue to mix occasionally until the chicken is almost cooked. Mine took about 6 minutes after I added the chicken. Then, add in your butter and bell peppers.
Cook for another few minutes, then taste the chicken. Adjust seasoning as needed. I don't have salt listed as an ingredient because most cajun seasonings have salt added. If you need to, add it in.
You can also adjust the heat with the cayenne pepper.
That is it! The chicken is done and ready to go!