1. Season the chicken breasts on both sides with garlic powder, onion powder, salt, and pepper. I like to do this the night before sometimes—it really lets the flavors seep in, and it makes dinner prep feel even easier.
2. Heat the olive oil in a large skillet over medium-high heat. Once hot, add the chicken breasts and sear for about 5-6 minutes on each side, or until golden brown and cooked through. The internal temperature should reach 165°F. Don’t rush this step—getting that nice color on the chicken adds so much flavor.
3. Remove the chicken from the skillet and set aside on a plate. Lower the heat to medium and add the sliced pepperoncini peppers along with about half their juice to the skillet. Let it simmer for a minute to release that tangy goodness.
4. Pour in the chicken broth, heavy cream, and Dijon mustard. Stir gently to combine and bring the mixture to a gentle simmer. This is where the magic happens—the sauce thickens and becomes velvety.
5. Stir in the grated Parmesan cheese until melted and smooth. If the sauce looks too thick, add a splash more broth or cream to reach your desired consistency.
6. Return the chicken breasts to the skillet, spooning the sauce over the top. Let everything simmer together for another 3-4 minutes so the chicken absorbs some of those bright, creamy flavors.
7. Sprinkle with fresh parsley before serving for a pop of color and freshness. I always keep a bunch of parsley in my fridge for moments like this—it’s an easy way to make a dish feel special.

When I first made this recipe, I found that adjusting the pepperoncini juice to my family’s taste made a big difference. If you like it tangier, don’t be shy to add a bit more. If your kids are sensitive to acidity, just dial it back a touch. Cooking, after all, is about making dishes your own.