He came off the bench with Inter trailing 2-0 to Palermo at half-time, then scored two goals and earned a penalty for the 3-2 victory.
"It was impossible to predict a day like this. It feels like a dream," grinned Pazzini.
"This has been an extraordinary afternoon with great joy and satisfaction. I dedicate the brace to those who believed in me, my girlfriend and those who stayed close in difficult times.
"Inter are still in the Scudetto race. We are not sated by success and it's a great pleasure to play alongside so many champions.