I start by melting butter with olive oil over medium-high heat. Then, I season the sirloin cubes with salt and pepper and brown them on all sides. Browning locks in flavor and ensures a hearty stew.
Next, I add onions and carrots to the pot. Cooking them for a few minutes softens the vegetables and allows them to absorb the beef flavor.
Sprinkle flour over the mixture and stir to coat. Then pour in apple cider and beef broth, bring to a boil, and transfer to the oven for 1–1.5 hours. The slow cooking makes the beef tender and the sauce rich.
While the stew cooks, I boil peeled potatoes until tender. Then I mash them with milk, sour cream, and cheddar cheese. The result is creamy, cheesy, and perfectly complements the stew.
Spoon the mashed potatoes onto plates and ladle the stew over the top. Garnish with chopped chives for a fresh, colorful touch.