Food process 18 graham cracker sheets until you get fine crumbs.
Mix graham cracker crumbs with ½ cup unsalted butter, ⅓ cup granulated sugar, and ¼ teaspoon rosemary until fully combined. It should feel like wet sand and clump together easily.
Transfer to 6-inch springform pan. I recommend using a cup to pack it into the bottom and up the sides. The more tightly packed, the better!Place in fridge or freezer while you make the filling.
Make the orange cheesecake filling:
In a large bowl, whip 8 ounces full-fat cream cheese, 3 tablespoons full-fat sour cream, and 2 teaspoons orange zest until there are no clumps. Use silicone spatula to scrape bottom and sides of bowl.
Mix in 1 tablespoon vanilla, ¼ cup powdered sugar, and ¼ cup orange juice until fully combined and smooth. Do not over mix.
In a medium mixing bowl, whip ½ cup heavy cream until you get very stiff peaks. Use silicone spatula to gently fold this into your cheesecake mixture.
Transfer filling into your chilled graham cracker crust and use offset spatula to evenly spread the top. Lightly cover and refrigerate for at least 3 hours.
Decorate (optional):
In a medium mixing bowl, whip 3 tablespoons heavy cream until you get stiff peaks. Split and dye with desired gel food coloring (I did orange & green to draw oranges!) and transfer to piping bags. Use this to decorate the cheesecake.
Add on edible flowers and rosemary. Enjoy!
Video
Notes
Baking Tip:
Weigh your ingredients! One of my favorite kitchen tools is a kitchen scale because it’s more accurate than measuring by volume. If you use cups, spoon the sugar in gently, then level it with a knife or spatula.
Storage Instructions:You can either store cheesecake slices in an airtight container or individually plastic wrap them. If the cake isn't fully cut, you can also lightly plastic wrap the remaining cake.
Refrigeration instructions: Store in the fridge for up to 5 days.
Freezing instructions: If plastic wrapping, do 3 layers to avoid freezer burn. Store in the freezer for up to 3 months. Let thaw in fridge overnight.