I start by patting the chicken cutlets completely dry with a paper towel, since moisture keeps them from browning properly. Then I season both sides with garlic powder, salt, and pepper. After that, I lightly coat each piece in flour, tapping off any excess so the coating stays thin.
I heat a drizzle of olive oil in a large skillet over medium heat until it shimmers slightly. Then I cook the chicken cutlets for about 4 minutes per side, until golden and cooked through. Once done, I remove them from the pan and set them aside on a plate.
Without wiping the skillet, I melt the butter right into those flavorful browned bits left behind. I add the minced garlic and sauté it for about a minute until it turns fragrant. This is where all that deep flavor starts to develop.
Next, I pour in the white wine and scrape up any browned bits stuck to the pan. I let it simmer gently until the liquid reduces by about half. This step really tightens up the flavor of the sauce.
Once the wine has reduced, I stir in the chicken broth and heavy cream. I let everything simmer on low for a couple of minutes, stirring often, until it starts to thicken slightly and look silky.
I sprinkle in the freshly grated parmesan cheese and stir continuously until it fully melts into the sauce. This is the moment the sauce transforms into something rich and velvety.
I toss in the baby spinach and stir it through the sauce. It looks like a lot at first, but it wilts down quickly within a minute or so. I season with a bit more salt and pepper here if needed.
Finally, I nestle the chicken cutlets back into the skillet, spooning some sauce over the top. I let everything simmer together for another couple of minutes until heated through and the sauce clings nicely to the chicken.