Melt butter in a small saucepan over medium heat.
1 tbsp butter
Add the shallots and sauté until translucent.
2 shallots
Add the cracked peppercorns and minced garlic, sauté until aromatic.
1 tbsp whole black peppercorns, 1 clove garlic
Add the stock and Worcestershire sauce. Use beef stock if serving with steak. Use chicken stock if serving with chicken or pork. Stir to incorporate.
1/2 cup stock, 1 tsp Worcestershire sauce
Stir the heavy cream into the sauce. Bring to a fast simmer, then reduce heat to medium-low.
1 cup heavy cream
Add the salt and thyme leaves. Stir to incorporate. Taste and adjust salt to your liking. Continue to cook over medium-low heat while frequently stirring until sauce is thickened. Keep at a low simmer until ready to serve.
1/4 tsp kosher salt, 1 tsp fresh thyme leaves
Ladle sauce over steak, chicken, or pork and serve.