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In a medium bowl, combine flour, salt, baking soda, baking powder, pumpkin pie spice; set aside.
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Use an electric mixer to combine the sugar, banana, oil, yogurt, pureed pumpkin, egg and vanilla (separate bowl from dry ingredients).
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With the mixer on low, gradually add the dry ingredients until incorporated.
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Fold in the chocolate chips.
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Grease the bundt pan (or use cooking spray), and transfer the batter to the bundt pan.
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Cover the pan with paper towels and then foil. I wrap the foil all the way around the bottom, and then roll the two edges to meet over on the top-facing side of the bundt pan. This makes a little "handle" that will make it easier to remove the bundt pan from the Instant Pot.
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Add 1.5 cups water to the inner stainless steel pot in the Instant Pot, and place the trivet inside.
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Place the bundt pan on top, place the lid on and lock it.
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Use the manual button, and set it to 35 minutes.
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Let the pressure release naturally for 10 minutes, then release the valve and remove the lid.
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Let the pan cool for a few minutes before trying to remove it.