Pour a little oil over a 1 ½ at covered casserole dish and set aside
Add all ingredients (except chocolate chips) to a blender.
Cover and blend at low speed for 20 seconds. You can continue blending until all the ingredients are well blended
Add the chocolate chips and stir with a spatula.
Pour the batter into the greased casserole dish and cover with the glass lid.
Pour a cup of water into your instant pot. Place the instant pot trivet inside the stainless steel pot
Add 1 cup of water into your Instant Pot and place the Instant Pot trivet inside the stainless steel pot.
Place the covered casserole dish inside the instant pot (On the trivet)
Cover the Instant Pot with the lid. Plug the Instant Pot. Make sure the vent on top of the lid is sealed.
Press the manual button to switch it to high pressure. Press the "+" sign to increase the time to 60.
Once you hear a beep, it means it is ready. Press the cancel button and unplug. Allow the Instant Pot to naturally pressure release for 20 minutes.
Remove the casserole dish with an oven mitt and place it on a cooling rack. Remove the lid and test with a toothpick to make sure the center is fully cooked. If it is, then you should see moist crumbs on the toothpick. If not, return the casserole dish to Instant Pot and set it on high pressure. This time you can set it between 7 to 8 minutes and do a quick release.
Allow to cool at room temperature for at least 45 minutes.
