Preheat oven to 375°F and spray a 9x13-inch baking dish with cooking spray.
In a medium bowl, combine marinara sauce and Alfredo sauce, mixing until well blended.
Spread 1 cup of the sauce mixture on the bottom of the prepared baking dish.
Arrange half of the frozen ravioli in a single layer over the sauce, then dollop half of the ricotta cheese over the ravioli and sprinkle with 1 cup mozzarella, half the Parmesan, garlic powder, and dried basil.
Pour half of the remaining sauce over the cheese layer, then repeat with remaining ravioli, ricotta, 1 cup mozzarella, remaining Parmesan, and sauce.
Cover with aluminum foil and bake for 30 minutes, then remove foil, top with remaining 1 cup mozzarella, and bake uncovered for 5 minutes until cheese is melted.
Garnish with fresh basil leaves before serving.