Combine the salt, black pepper, and garlic powder in a small dish or ramekin. Season each of the four chicken cutlets on both sides.
Fill a small basin with flour. To coat all sides, dip and dredge the chicken in the flour.
A big skillet should be heated at medium-high heat. Add one tablespoon of butter and some olive oil.
The chicken cutlets should be cooked for 4–5 minutes on each side, or until golden brown, once the butter has melted. Place the cutlets on a platter and keep them there.
To the pan, add the onions, garlic, and the remaining 1 tablespoon of butter. Saute onions for 3 minutes, or until they become tender.
Add the heavy cream, milk, and chopped chipotle peppers in adobo sauce and reduce the heat to medium. Mix well with a whisk and boil gently.
Return the browned chicken cutlets to the pan and continue cooking for an additional five minutes, or until the chicken is cooked through and the sauce has thickened.
Add some chopped cilantro as a garnish and serve.