In a medium saucepan, warm the chicken broth over low heat. Add the saffron threads and let them bloom for 5 to 10 minutes. Keep the broth at a gentle simmer.
In a large skillet, heat the olive oil and 1 tablespoon butter over medium heat.
Add the shallot and cook until soft and fragrant, about 2 minutes.
Stir in the arborio rice and toast for 1 minute.
Pour in the white wine and stir until mostly absorbed.
Ladle in the warm saffron broth, one scoop at a time, stirring often and letting each addition absorb before adding the next.
Continue until the rice is creamy and tender with a slight bite, about 18 to 20 minutes.
Remove from the heat and stir in the remaining 1 tablespoon butter and the Parmigiano Reggiano.
Notes
Keep the broth hot: Adding warm, saffron-infused broth helps the rice cook evenly and keeps the risotto creamy.
Stir often, not constantly: Regular stirring encourages creaminess without breaking down the grains.
Finish off the heat: Stir in the butter and Parmigiano after removing the pan from the heat for the best texture.