Instructions:

• Step 1: Prepare the Crust: In a medium bowl, combine 1 1/2 cups of cookie crumbs with 5 tablespoons of melted butter and 1/3 cup of sugar. Mix until the crumbs are evenly coated. Press the mixture firmly into the bottom of a 9-inch springform pan to form an even layer. Set aside.
• Step 2: Make the Cheesecake Filling: In a large mixing bowl, beat 1 pound of cream cheese until smooth. Gradually add 2/3 cup of sugar, mixing until well combined. Add the 1/2 cup of mashed ripe banana, 1/4 cup of sour cream, and 2 tablespoons of flour. Mix until smooth and creamy.
• Step 3: Incorporate the Eggs: Add the 4 eggs, one at a time, mixing on low speed until just combined after each addition. Be careful not to overmix, as this can introduce too much air into the batter.
• Step 4: Add the Chocolate: Melt 1 ounce of unsweetened chocolate and allow it to cool slightly. Gently fold the melted chocolate into the cheesecake batter, creating a marbled effect.
• Step 5: Bake the Cheesecake: Pour the cheesecake filling over the prepared crust in the springform pan. Bake in a preheated oven at 325°F (160°C) for about 55-65 minutes, or until the center is set and only slightly jiggly. Turn off the oven and leave the cheesecake inside with the door ajar for an hour to cool gradually.
• Step 6: Chill: Remove the cheesecake from the oven and let it cool to room temperature before refrigerating for at least four hours, or preferably overnight. This allows the flavors to meld beautifully.
• Step 7: Serve with Fresh Toppings: Once chilled, top the cheesecake with 2 cups of fresh strawberries, whipped cream, and chopped walnuts if desired. Slice and serve to enjoy the decadent flavors of your Banana Split Cheesecake!