Peanut Butter Molten Cakes - Instant Pot Singapore

Ingredients

• 1/2 cup Butter ((1 stick) cut into cubes, plus more for ramekins)
• 1 cup Chocolate Chips
• 1/2 cup Powdered Sugar (plus more for topping)
• 2 large Eggs (plus 2 egg yolks)
• 1 tsp Pure Vanilla Extract
• 1/4 cup Unsweetened Cocoa Powder
• 1/4 cup All-Purpose Flour
• 1/2 tsp Kosher Salt
• 4 tbsp Peanut Butter (divided)