In a saute pan add the chorizo, onions and garlic and saute until chorizo is cooked through making sure to chop up the chorizo into small pieces. (Drain the grease when done)
In a large cast iron pan or 9x13 aluminum foil pan, add the cubed up Valveeta, pepper jack, Rotel with liquid, seasoning, jalapenos if using and cooked chorizo.
Set smoker to 225-275 degrees. Feel free to add whatever smoking wood you prefer. We cooked this on our Green Mountain Pellet Grill smoker with pecan pellets.
Place pan on smoker and cook for around 1 1/2 hours. Check on it every 20 minutes and give it a good stir. (it will start out watery but it will thicken up)
Once the smoked queso is all gooey and melted, it is ready to take off and enjoy! Eat with tortilla chips or even put this on tacos or burgers!