Line a 7in round springform pan with parchment paper
Spray the pan with pam baking spray
Using a large bowl, mix the melted butter, eggs, flour, baking powder, cocoa powder, sugar salt and vanilla until combined
Pour the batter into your springform pan
Cover with foil
Pour the 1 C of water into the bottom of the springform pan
Place a trivet into the instant pot
Place your cake onto the trivet
Cook on manual high pressure for 23 minutes and then allow the steam to release naturally
Remove foil and allow the cake to cool completely
Remove cake from springform pan and place onto a 8in round board
Using a cake leveler, remove the dome of the cake
Slice the cake in thirds to create three layers