To the same pot with the rice, add in the whole milk, sugar, and salt. Cook and stir over medium heat until thick and creamy, about 10-15 minutes. Working quickly and carefully, whisk in the beaten egg, vanilla bean paste and raisins and stir vigorously until egg is incorporated and mixture is smooth. Cook for 2-3 minutes longer. Lastly, add in the butter, condensed milk, and spices, stirring until combined, and cook for another 1-2 minutes more. Serve!