Begin by patting your steak cubes dry with paper towels to remove excess moisture, then season all sides with salt and pepper.

Heat olive oil in a large skillet over medium-high heat until shimmering, then sear steak cubes for 2–3 minutes on each side.

Reduce skillet heat to medium, melt 3 tablespoons of unsalted butter, and sauté minced garlic until fragrant.

In a separate saucepan, melt 1 tablespoon of butter, add minced garlic, then slowly pour in heavy cream and simmer.

Stir in Parmesan cheese until melted, adding red pepper flakes if desired, and adjust the consistency with more cream if necessary.

Serve steak bites drizzled with Parmesan cream sauce, garnished with chopped parsley.