Preheat oven to 350 degrees F. Place tortilla chips in a 9- x 13-inch baking dish.
In a medium saucepan, combine refried beans and taco seasoning mix over medium heat, stirring constantly until heated through; spoon over tortilla chips.
Sprinkle cheese over bean mixture and bake 3 to 5 minutes, or until cheese is melted. Dollop with guacamole and sour cream then sprinkle with scallions, tomato, and sliced jalapenos, if desired. Serve immediately.
Note: Serve your Layered Nachos Supreme with salsa and Fresh Avocado Dip or sour cream on the side.
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