Add graham crackers and sugar to the bowl of food processor and pulse a couple of times, until small crumbs form.
Melt butter in microwave or on stove top and add to graham cracker mixture. Pulse until just combined.
Pour graham cracker mixture into bottom of greased cheesecake pan and press the mixture firmly into the bottom of the pan and nor more than one inch up along the sides.
Place pan with crust into the freezer for 15 minutes.
Filling
Blend together cream cheese, sugar, flour, vanilla bean caviar, heavy cream and vanilla extract until smooth.
Add eggs and yolk, one at a time, mixing just to combine.
Pour filling into the pan, on top of the graham cracker crust.
Cook
Add 1.5 cups of water to the bottom of your pressure cooker and then place a trivet inside the pot.
Cover the cheesecake first with a paper towel and then with a piece of aluminum foil and loosely secure the foil.
Place cheesecake into pressure cooker using a sling.
Lock on Lid and close Pressure Valve. Cook at High Pressure for 38 minutes. When Beep sounds, wait 18 minutes and then release any remaining pressure and remove the Lid.
Remove the foil and paper towel and dab off any liquid that may have accumulated.
The center will be a bit jiggly, but don't worry. The heat that is trapped inside will continue to cook the center while the cheesecake cools.
Let cool on wire rack for one hour. Lightly cover and place in refrigerator overnight.
Melt 3/4 cup milk chocolate chips with 1-2 teaspoons of shortening in a microwave save bowl. Heat at 20 second intervals, stirring in between until you get a consistency that's able to be piped.
Fill a pastry bag fitted with a small diameter tip with the melted chocolate. Starting at the center pipe a swirl of chocolate continuing outward. When done use a knife or toothpick to create the web design by pulling from the center of the swirl toward the outer edge.
For the spider. On parchment paper using same small diameter tip pipe out 8 legs. On top of the legs pipe out two small ball shapes for the body. Place in the refrigerator to harden. Peel off of the parchment and place on cake when ready to serve.
Notes
Any kind of cookie crumbs can be used. Nilla Wafers, Shortbread, Ginger Snaps, Chocolate thins, etc.Use 1 teaspoon more flour if you want a denser filling.If you use a 7 inch pan, cut the cooking time to 30 minutes. I like the height of the cake in a 6 inch pan. The percentage of filling to crust is perfect.If using the mini 4 inch pans, cook for 12 minutes.For Single Serving Jar Cheesecake 8 oz Wide Mouth Glass Jar - cook 7 minutes 4 oz Wide Mouth Glass Jar - cook 4 minutes 16 oz Glass Jars - DON'T DO IT! 15 minute Natural Pressure Release