Grease 4-ounce ramekins. In the inner liner of your Instant Pot, add one cup of water and the trivet.

In a microwave-safe medium bowl, combine the butter and the chocolate chips. Microwave on high for 30 seconds. Stir and microwave for 30 seconds more to fully melt.

In a mixing bowl, add the eggs, sweetener and vanilla extract. Beat with a hand mixer on high until pale and fluffy, about 2 minutes.

Add almond flour and salt and mix again. Add in the melted chocolate mixture to combine.

Fill each ramekin about ¾ of the way full with batter. Cover tightly with foil. Place 4 ramekins directly on steamer rack and then place remaining ramekins on top of these to build a pyramid.

Close and lock the lid. Set the valve to sealing. Set the pressure to High Pressure and cook time to 6 minutes.When the time is up, quick-release the pressure. Quickly and carefully remove ramekins from Instant Pot.

While still warm, flip ramekins over to unmold lava cakes. Serve immediately.