Whisk in flour and cook for two more minutes. Gradually whisk in the milk until the mixture starts to thicken, about 10 minutes. Once thickened, stir in heavy cream, remaining tablespoon of Slap Ya Mama Original Cajun Seasoning, and salt and pepper to taste.
Take the skillet off the heat and mix in cheddar and pepper jack cheeses. Fold in the cooked pasta. Scoop mac n’ cheese into a bowl and enjoy!