Dry the chicken cutlets with paper towels and gently pound each to about 1/2 inch thickness for even cooking.
Set up three shallow dishes: flour seasoned with salt and pepper; Italian breadcrumbs mixed with grated Parmesan; melted butter.
Dredge each chicken cutlet in flour, shake off excess, dip in melted butter, then coat evenly with breadcrumb-Parmesan mixture.
Melt 2 tablespoons butter in a large skillet over medium heat. Cook chicken cutlets 4-5 minutes per side until golden brown and cooked through. Drain on paper towels.
Cook spaghetti in a large pot of salted boiling water until al dente. Reserve 3-4 tablespoons pasta water and drain the pasta.
In the same skillet, lower heat and add heavy cream, lemon zest, lemon juice, garlic powder, salt, and pepper. Stir and simmer until slightly thickened.
Add drained pasta to the skillet and toss with the creamy lemon garlic sauce. Add reserved pasta water gradually to adjust sauce consistency.
Plate the creamy pasta and top with crispy Parmesan chicken. Garnish with chopped fresh parsley and additional Parmesan if desired. Serve and enjoy!