Preheat the oven to 375°F. Line a 9×13-inch baking dish with parchment paper.
Cook the ground beef in a large skillet over medium-high heat for 7 to 9 minutes, breaking it into small crumbles, until fully cooked and it reaches 160°F. Drain the excess grease.
Reduce the heat to low. Stir the dry onion soup mix into the ground beef and cook for one additional minute. Remove from the heat.
Unroll one can of crescent dough into the prepared baking dish. Press it evenly over the bottom and prebake for 7 to 9 minutes, until lightly set.
Spread the cooked ground beef evenly over the partially baked crescent crust.
Sprinkle the shredded cheddar cheese over the beef in an even layer.
Unroll the second crescent dough sheet over the filling. Gently press the edges together with the bottom crust where possible.
Bake for 16 to 20 minutes, until the top is golden brown, the dough is cooked through, and the cheese has melted.
Remove from the oven and allow the casserole to rest for 5 minutes.
Cut into 8 equal squares and serve warm.