In a large bowl, thoroughly mix all ingredients until a perfectly smooth mixture is obtained.
Next, pour 1 cup filtered water into the Instant Pot and insert the trivet.
Transfer the mixture from the bowl into a well-greased, Instant Pot–friendly pan (or dish).
Using a sling if desired, place the pan onto the trivet, and cover loosely with aluminum foil. Close the lid, set the pressure release to Sealing, and select Manual/Pressure Cook. Set the Instant Pot to 40 minutes on high pressure, and let cook.
Once cooked, let the pressure naturally disperse from the Instant Pot for about 10 minutes, then carefully switch the pressure release to Venting.
Open the Instant Pot and remove the pan. Allow the cake to cool fully before serving. Add any desired toppings on top of the finished dessert, serve, and enjoy!