Cover the potatoes with cold water in a large pot and add a generous pinch of salt. Bring to a boil and cook until the potatoes are fork tender, about 15–20 minutes. Drain and return to the pot.
Melt the butter:
Meanwhile, melt the butter in the microwave in 10 second increments until melted. Add the saffron, crumbling it between your fingers first. Stir to combine and set aside.
Mash the potatoes:
Using a potato masher, mash the potatoes until completely smooth. Taste and season with salt, pepper, and garlic powder.
Pour in the milk, cream, and all but a tablespoon of the saffron butter and continue mashing until smooth and combined. Taste and season again to your preferences.
To serve:
Spoon the potatoes into a bowl and use the back of your spoon to smooth it out and create some dips and valleys. Pour the remaining saffron butter on top and serve immediately. Enjoy!