Line a 9x9-inch baking pan with parchment paper, leaving some overhang on the sides for easy removal later.
In a mixing bowl, combine the Oreo crumbs and melted butter. Mix until the crumbs are fully coated and resemble wet sand.
Transfer the crumb mixture into the prepared pan and press it firmly into an even layer. Use the bottom of a glass to ensure it’s well-packed.
Preheat your oven to 325°F (160°C) to get it ready for baking.
In another mixing bowl, beat the cream cheese with an electric mixer until smooth and creamy. Gradually add in the granulated sugar and continue to mix.
Add the eggs one at a time, mixing well after each addition. Then, add the heavy cream, vanilla bean seeds (or extract), and Nutella, mixing until fully incorporated and smooth.
Pour the cheesecake filling over the prepared Oreo crust. Use a rubber spatula to spread it evenly across the top.
Bake in the preheated oven for 30-35 minutes or until the edges are set, and the center has a slight jiggle.
Remove from the oven and let it cool at room temperature. Then refrigerate for at least 4 hours, or overnight if you can resist!
Once chilled, lift the bars out of the pan using the parchment overhang. Slice into squares and enjoy the decadent Nutella cheesecake goodness!