Grease all sides of the cake pan. Add 1 cup of water to the Instant Pot insert.

In a large bowl combine cake mix, 1 cup of water, canola oil and 3 eggs. Mix well until a batter is formed.

Beat cake mix, 1 cup water, ⅓ cup oil, and 3 whole eggs in a bowl. Pour the batter in the greased cake pan.

Gently cover the cake pan with a paper towel. Using a piece of aluminum foil, cover the paper towel, and gently secure the paper towel around the rim of the pan.

Place the cake pan on the trivet and carefully place the trivet inside the Instant Pot insert.

Add the Instant Pot lid and set the valve or steam release handle to the sealing position. Press the “Cake” button and set the mode to “Less”. Adjust the cooking time to 50 minutes. If your instant Pot does not have the cake setting set the cake to cook on high pressure for 50 minutes.

Once the cake has finished pressure cooking, allow the pressure to naturally release from the pot. After 15 minutes remove any remaining pressure before taking off the lid. Remove the cake pan from the Instant Pot. Remove the foil and place it on a cooling rack to cool.

To make your orange cake frosting or glaze, whisk together the powdered sugar (icing sugar) and milk until you reach your desired consistency.

Zest an orange and mix it into the orange cake glaze. Pour the glaze over the top of the cake and set aside until the glaze hardens. Be sure to allow your cake to cool completely before adding the glaze.

Your Instant Pot orange cake is now ready to cut and serve!