1 1/2 cups graham cracker crumbs
6 tablespoons butter, melted
2 8-ounce packages cream cheese, softened
1 cup granulated sugar
2 ripe bananas, sliced
1/4 cup sour cream
2 teaspoons vanilla extract
2 large eggs
Preheat oven to 325 degrees F and spray a 9-by-13-inch baking dish with nonstick cooking spray.
Prepare the crust. Place the graham cracker crumbs and melted butter into a large bowl and mix well. Press the crumb mixture into the bottom of the baking dish and up the sides slightly. Some find pressing the bottom of a glass into the mixture can help make a firmer crust.
Add the cream cheese to the bowl of a stand mixer and whip until it's light and fluffy. Add the sugar and bananas and beat on medium speed until the mixture is smooth and the banana has been broken down into small pieces.
Add the sour cream and the vanilla and beat until smooth. Add the eggs one at a time, beating until smooth after each one.
Pour the cheesecake filling evenly over the crust. Bake for 45 minutes, until the center is almost set and it jiggles just a little bit.
Remove from the oven and let the cheesecake bars cool slightly, for about half an hour. Transfer the dish to the fridge and let it fully set for about 3 hours.