Cream together butter and sugar. Add in remaining wet ingredients and mix well.
Combine flour, baking soda, baking powder and salt. Add to the wet ingredients and blend until well combined. Pour batter into the springform pan.
Mix together 2 tablespoons brown sugar and pecans and spread this over the top of the batter in the springform pan.
Top applesauce cake with aluminum foil and place the springform pan on Instant Pot trivet.
Add water to the pressure cooker and then place the springform pan into the pressure cooker on top of the trivet.
Close the Instant Pot and seal the valve. Set to a manual pressure cooking time of 60 minutes.
Allow for a natural pressure release before removing the lid. Remove apple spice cake and set on a wire rack to cool.
Notes
To bake this apple spice cake in a conventional oven, preheat the oven to 350 degrees. Bake cake for 50-60 minutes or until a toothpick inserted in the center comes out clean.