Gather and measure all the ingredients for your Instant Pot banana bread bites. Spray the egg bite molds with cooking spray, then set them aside.
Place the sugars and softened butter in a mixing bowl. Beat with a hand mixer on medium speed for about 1 to 2 minutes, or until the mixture looks light and fluffy. Add the eggs and vanilla extract, then mix with a spoon until combined.
Stir in the mashed bananas and sour cream. Mix until everything is fully incorporated.
In a separate bowl, sift together the flour, baking powder, baking soda, salt, and cinnamon. Add the dry ingredients to the wet ingredients and gently stir to combine. Do not over-mix!
Pour the banana bread batter into the silicone molds, filling each cup about halfway. Cover the molds with foil.
Stack the silicone molds on the trivet. Pour 1 and 1/2 cups of water into the Instant Pot.
Carefully place the trivet inside the Instant Pot. Close the lid and set the pressure release valve to Sealing.
Cook on High Pressure for 14 minutes. When the cooking time is complete, carefully quick-release the pressure by turning the steam release knob to Venting.
Once the pin drops, open the lid and remove the trivet from the Instant Pot using pot holders.
Remove the foil, then gently transfer the banana bread bites to a plate. Serve warm or let them cool. Top with chocolate chips before serving if you like!