1. Prepare cake according to package directions. 2. .Add 1 cup water to the instant pot. 3. Grease egg cups with cooking spray and and scoop 3 tbsp batter into cup. 4. Place the pan onto the trivet and lower it into the pot. Place the lid onto the instant pot and seal shut. Close the pressure release valve. Set the instant pot to manual, high pressure for 12 minutes. When cooking is complete, quick release pressure and carefully open pot. 5. Remove trivet and pan from the pot and set aside to cool for 2-3 minutes. Flip pan to remove cake bites from the pan. Set aside to cool completely. 6. Add water to the instant pot, about 1/2 cup. Re-spray the pan with cooking spray and add batter to the pan and repeat the process twice. 7. Once cooled,frost and sprinkle with copped walnuts.