First, start by combining the white granulated sugar and corn starch in a bowl and whisking together to break up any lumps.
In a stand mixer or mixing bowl if using a hand mixer, combine the softened cream cheese, white granulated sugar and corn starch. Mix on low speed until you have a smooth texture.
Next, add in the eggs one at a time. Mix on low until well incorporated.
Add in the coconut cream and mix on low to combine.
Next, use a spatula to gently fold in the coconut rum just until combined.
Remove the crust from the freezer and pour the cheesecake filling into the crust. If needed, run the tip of a knife over the top of the cheesecake to pop any air bubbles.
Cover the top and bottom of the spring form pan with aluminum foil.
Next, add 1 1/2 cups of water to the instant pot. I have an 8 qt but you may need more or less depending on what size you have.
Place the trivet inside the instant pot and lower the cheesecake on to the trivet. Close the lid and cook on high pressure for 40 minutes with a 15 minute natural release.
Once the 15 minute natural release is finished, engage the quick release button to release any remaining pressure. Once the valve (metal pin) drops, you’ll know all the pressure has been released.
Gently remove the coconut rum cheesecake from the instant pot and let it cool down to room temperature for about 45 minutes. Transfer to the refrigerator and chill for at least 8 hours.
Finally, top with homemade whipped cream and toasted coconut flakes and enjoy!