Cook gnocchi according to package directions. Drain and set aside.
In a large skillet, melt butter over medium heat. Add mushrooms and minced garlic. Saute until tender, for about 5-6 minutes. Season with salt and pepper. Remove to a plate and set aside.
In the same skillet, add chicken broth, heavy cream, and flour. Whisk until smooth. Simmer on low for about 3-4 minutes, or until slightly thickened. Add gnocchi and stir to combine.
Stir in Parmesan cheese until thoroughly combined. Remove from heat.
Add mushrooms and stir. Season with salt and pepper and garnish with chopped parsley, if desired. Serve immediately.
Notes
If sauce is too thick, add about ½ tablespoon-2 tablespoons additional heavy cream to thin out.