Preheat oven according to directions on the package for the crescent rolls. 375F
Spray a 8 x 8 baking dish with cooking spray and roll the crescent roll dough out on the bottom to form a bottom crust and bake according to package. The crust should be golden brown.
While the crust is baking in a large skillet over medium-high heat chop up and cook the burger and onion, until onion is soft, and a burger is no longer pink inside; drain if needed. Mix in the taco seasoning until well combined.
Spread the meat mixture over the bottom of the crescent crust, and then layer the sour cream over the top followed by the Mexican-style cheese blend. Top with the crushed tortilla chips.
Bake at 375F. Until heated through and cheese is melted – Serve hot.