Chocolate Lava Cake in the Instant Pot

This recipe came from Tyler Jumper.

Chocolate Lava Cake in the Instant Pot
1 c. water, for instant pot
1 c. semi-sweet chocolate chips
1/2 c. butter
1 c. powdered sugar
3 eggs
1 egg yolk
1 T. vanilla
3/8 c. flour
4 Pyrex 6 oz. bowls
For Topping:  ice cream, caramel drizzle, Magic Shell Chocolate ice cream topping
Microwave chocolate chips and butter in a large bowl for  2 minutes.  Stir in powdered sugar until smooth.  Add eggs and egg yolk and stir well.  Add vanilla and  flour and stir well.  Spray Pyrex bowls with cooking spray.  Pour batter into each bowl filling to the top.
Place trivet and 1 cup water in the instant pot and then place the bowls on the trivet.  Stack them if needed.
Seal.  Manual for 9 minutes.  Quick Release.
Remove bowls, rest 2 minutes and place upside down on a plate.  Top with ice cream, caramel and magic shell.  Enjoy!
*For a Peanut Butter Lava Cake, mix together:  4 T. peanut butter, 1 T. butter, 2 T. powdered sugar.
Fill bowl half full with batter and then add 1/4 of this peanut butter mixture to each bowl and then finish filling bowl with batter.