Ingredients
Method
- Place the peeled, chunked potatoes in a large pot of cold water. Bring to a boil, then simmer for 15 to 18 minutes until fork-tender. Drain and return to the hot pot over low heat for 1 minute to dry out.
- Remove the pot from heat. Mash in 4 tbsp butter, then add the warmed 1/2 cup milk and 1/4 cup sour cream and mash until smooth. Season with 1 tsp salt and 1/4 tsp white pepper. Keep covered on low.
- In a medium saucepan over medium heat, melt 3 tbsp butter. Add 3 tbsp flour and whisk for 2 minutes until light golden.
- Pour in 1 1/2 cups chicken broth and 1/2 cup beef broth slowly, whisking constantly. Add 1 tsp Worcestershire sauce. Cook on medium-high for 3 to 4 minutes until thickened, then simmer on low for 2 more minutes. Season with salt and black pepper.
- Spoon the mashed potatoes into bowls, ladle the gravy over the top, and finish with a pat of butter and a crack of black pepper.
Notes
These taste best when the gravy goes on right before serving, while both components are still hot. If you're making this for a group, the potatoes hold well covered on the lowest heat setting for up to 20 minutes with no quality loss. The one thing worth avoiding is salting the gravy before it has fully reduced, since it concentrates as it thickens.
