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First things first, get those potatoes ready! I peel and slice my Yukon Golds into about 1/4-inch thick rounds. Try to keep them even so they cook uniformly—I totally forgot once, and ended up with some crunchy bits and some mushy bits, a real mixed bag! Then, I boil them in salted water for about 5-7 minutes until they're just fork-tender, but not falling apart. This is a crucial step for the perfect texture in your Garlic Butter Steak Cheddar Potato Bake, so don't skimp on it!
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While the potatoes are doing their thing, pat your sirloin steaks dry and season them generously with salt, pepper, and a little onion powder. Heat a tablespoon of olive oil in a skillet over medium-high heat until it’s shimmering. Sear the steaks for 2-3 minutes per side for a nice crust and medium-rare inside. I always get a little thrill seeing that beautiful brown sear! Pull them out and let them rest on a cutting board. Don't skip the resting part, honestly, that's how you keep the juices locked in.
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In the same skillet (don't clean it, those browned bits are flavor!), melt your unsalted butter over medium heat. Add the minced garlic and cook for about 1 minute until fragrant. Oh, the smell! It fills the kitchen and just screams 'comfort food.' Stir in the heavy cream, paprika, and a good pinch of salt and pepper. Let it simmer gently for 2-3 minutes until it thickens slightly. This rich, aromatic sauce is what ties the whole Garlic Butter Steak Cheddar Potato Bake together!
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Now for the fun part! Slice your rested steak against the grain into bite-sized pieces. Grab a 9x13 inch baking dish. Layer half of the par-cooked potato slices on the bottom. Scatter half of the steak pieces over the potatoes, then pour half of that glorious garlic butter cream sauce evenly over everything. Sprinkle with half of your freshly shredded sharp cheddar. Repeat with the remaining potatoes, steak, sauce, and cheese. It’s okay if it looks a little messy, that’s just real kitchen life!
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Pop that dish into a preheated oven at 375°F (190°C). Bake for 20-25 minutes, or until the potatoes are completely tender, the sauce is bubbly, and the cheese is melted and beautifully golden brown. I always peek through the oven door, watching the cheese get all bubbly and irresistible. If it’s not quite as golden as I like, I’ll sometimes give it a quick broiler blast for a minute, but watch it like a hawk!
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Once it’s out of the oven, let the Garlic Butter Steak Cheddar Potato Bake rest for about 5-10 minutes. This helps the sauce settle and prevents it from being too runny when you scoop it out. Sprinkle generously with fresh chopped parsley for a pop of color and freshness. The whole kitchen smells amazing at this point, truly! Serve it up hot and enjoy every single hearty, cheesy bite. It's truly satisfying.