Chocolate Orange Supreme Cheesecake

Preheat oven to 325°F (160°C). Mix chocolate wafer crumbs with cinnamon and melted margarine, then press firmly into the bottom of a 9-inch springform pan to form an even crust.

Beat softened cream cheese and sugar together until smooth and creamy, scraping down the sides of the bowl occasionally.

Add large eggs one at a time to the cream cheese mixture, beating on low speed after each addition until just combined.

Stir in sour cream and vanilla extract until fully incorporated.

Fold melted semi-sweet chocolate chips, orange-flavored liqueur, and grated orange peel into the batter until evenly distributed.

Pour the filling over the chocolate crust and smooth the top with a spatula.

Bake for 45-50 minutes, until the cheesecake is set around the edges but still slightly jiggly in the center.

Turn off the oven and crack the door open slightly, allowing the cheesecake to cool in the oven for 15 minutes to prevent cracking.

Remove from the oven and let cool to room temperature, then refrigerate for at least 4 hours or overnight before serving.