Warm broth and milk in a medium saucepan over medium heat. Stir in garlic and salt; bring to a gentle simmer.
Whisk in the cornmeal in a slow, steady stream to prevent lumps.
Reduce heat to low. Cook, whisking often at first, then stirring, until thick and tender, 25–30 minutes.
Take off heat. Stir in butter, Parmesan, and heavy cream until smooth and glossy.
Season with pepper and more salt if needed. Thin with a splash of hot milk or broth if too thick.
Serve right away while creamy; polenta will firm as it cools.
Notes
Variation: Swap chicken broth for vegetable broth to make it vegetarian, or stir in a spoonful of mascarpone for extra silkiness. Leftovers firm up in the fridge; slice and pan-sear with a little butter, or reheat gently with a splash of milk to loosen.This recipe is an original creation inspired by classic Creamy Parmesan Polenta Recipe flavors. All ingredient ratios and instructions are independently developed.