Garlic & Herb Butter Steak Bites Over Creamy Mashed Potatoes is two dishes on one plate: cubed sirloin seared hard in garlic-thyme butter, piled on potatoes whipped with warm cream and butter. The steak cooks in eight minutes; the potatoes take the rest of the clock.
Weigh everything first. The steak sears at 232°C (450°F) and needs a dry surface, so pat the cubes and salt them before the pan heats. The potatoes need a warm dairy addition, not cold, or they turn gluey.
This serves six at roughly 285 calories a plate. Use a heavy skillet that holds the cubes in a single layer; crowding steams the meat and you lose the crust.
Why You'll Love This Recipe
About the Ingredients
900 g (2 lb) sirloin steak, cut into 2.5 cm (1 inch) cubes
Sirloin balances price and tenderness. Ribeye works for more fat; flap steak is a leaner, cheaper substitute.
900 g (2 lb) russet potatoes, peeled and cut into 4 cm (1.5 inch) chunks
Russets mash fluffy and absorb butter well. Yukon Gold gives a denser, creamier result with less milk.
120 g (8 tbsp) unsalted butter, divided
Split it: 60 g for the potatoes, 60 g for the steak pan. Salted butter works if you cut the added salt by half.
120 ml (1/2 cup) whole milk, warmed
Whole milk keeps the mash rich. Heavy cream makes it richer; oat milk thins it and tastes sweeter.
60 g (1/4 cup) sour cream, room temperature
Adds tang and body. Greek yogurt is a close substitute; skip both and use 30 g more butter.
6 garlic cloves, finely minced, divided
Three cloves go into the potatoes, three into the steak butter. Fresh only here; jarred garlic burns and tastes bitter.
15 g (1 tbsp) fresh thyme leaves, chopped
Thyme holds up to high heat. Rosemary is stronger; use half the amount or it overpowers the butter.
10 g (2 tsp) kosher salt, divided, plus more to taste
Kosher salt seasons evenly. If using fine table salt, use 7 g (1 1/2 tsp) total.
3 g (1 tsp) freshly ground black pepper
Coarse grind gives texture and aroma. White pepper is milder and disappears into the mash.
15 ml (1 tbsp) neutral oil, such as canola
Raises the smoke point so the butter does not scorch. Any high-heat oil works; olive oil smokes early.
10 g (2 tbsp) fresh flat-leaf parsley, chopped
Finishes the plate with color and freshness. Chives are a sharper substitute; add them after the pan is off heat.
Tips & Tricks
Dry the meat
Pat the steak cubes thoroughly and salt them 20 minutes ahead, so the surface sears instead of steaming.
Warm the dairy
Heat the milk and sour cream before mashing, because cold liquid makes potatoes gluey.
Work in batches
Sear the steak in two batches at 232°C (450°F), since a crowded pan drops temperature and boils the juices.
Rest before slicing
Let the seared cubes sit 3 minutes off heat so the juices stay in the meat, not on the plate.
Pro Tips
Step-by-Step Instructions
1. Salt the steak
Pat 900 g (2 lb) of cubed sirloin dry and toss with 5 g (1 tsp) kosher salt. Rest 20 minutes at room temperature (the salt brines the surface so it browns faster).
2. Boil the potatoes
Cover 900 g (2 lb) potato chunks with cold water by 3 cm (1 inch) and add 3 g (1/2 tsp) salt. Boil at 100°C (212°F) for 15 to 18 minutes, until a knife slides in with no resistance.
3. Warm the dairy
Heat 120 ml (1/2 cup) milk and 60 g (4 tbsp) butter in a small pan at 60°C (140°F) until the butter melts. Keep warm (cold dairy makes the mash gluey).
4. Mash the potatoes
Drain the potatoes and steam-dry 2 minutes, then rice or mash them with the warm dairy, 60 g (1/4 cup) sour cream, and 3 garlic cloves. Stir until smooth and glossy, then season to taste.
5. Heat the skillet
Set a heavy 30 cm (12 inch) skillet over high heat with 15 ml (1 tbsp) oil until it shimmers and a water drop sizzles instantly, about 232°C (450°F).
6. Sear batch one
Add half the steak cubes in a single layer and sear 2 minutes per side, 4 minutes total, until deep brown with an internal temperature of 52°C (125°F) for medium-rare. Move to a plate.
7. Sear batch two
Sear the remaining cubes the same way, 4 minutes at 232°C (450°F), then return the first batch to the pan. The meat should feel springy, not firm, when pressed.
8. Finish with garlic butter
Lower heat to medium and add 60 g (4 tbsp) butter, 3 garlic cloves, and 15 g (1 tbsp) thyme. Swirl 30 seconds until fragrant and foaming, then toss the steak to coat (garlic browns in under a minute).
9. Plate and serve
Spoon the warm mash onto six plates, top with steak bites and pan butter, and scatter 10 g (2 tbsp) parsley. Serve immediately while the butter is still bubbling at the edges.
Delicious Variations
Rosemary Red Wine
Swap thyme for rosemary and deglaze the pan with 60 ml (1/4 cup) dry red wine before adding butter.
Garlic Butter Chicken
Use 900 g (2 lb) boneless thighs cut into cubes and sear 3 minutes per side to 74°C (165°F).
Horseradish Mash
Stir 20 g (1 tbsp) prepared horseradish into the potatoes for a sharp counterpoint to the butter.
How to Store Garlic & Herb Butter Steak Bites Over Creamy Mashed Potatoes 🥩🌿
Refrigerator
Store steak and potatoes separately in airtight containers for up to 3 days; the butter solidifies and the mash thickens.
Freezer
Freeze the mash alone for up to 2 months in a sealed bag; the seared steak loses texture and is best eaten fresh.
Reheating
Reheat the mash with a splash of milk over low heat, and warm the steak in a 160°C (325°F) oven for 6 minutes, covered.
Frequently Asked Questions
Q: What cut of steak is best for steak bites?
Sirloin is the best all-purpose choice because it is tender enough to cube and cheap enough to sear hard. Ribeye gives more marbling and flavor, while flap steak is leaner and needs a shorter sear. Avoid stew meat, which stays tough at 232°C (450°F).
Q: How do I keep steak bites from being tough?
Sear them hot and fast and pull them at 52°C (125°F) for medium-rare. Cubes cooked past 60°C (140°F) tighten and turn chewy, so use an instant-read thermometer and rest them 3 minutes. Cutting against the grain before cubing also shortens the fibers.
Q: Can I make the mashed potatoes ahead of time?
Yes, make the mash up to 4 hours ahead and hold it covered over a pot of simmering water. Stir in 15 g (1 tbsp) warm butter before serving to restore the glossy texture. Do not refrigerate and re-mash cold potatoes, because they turn grainy.
Q: Why did my garlic butter turn bitter?
The garlic burned because it hit a pan that was too hot and stayed too long. Add garlic only after lowering the heat to medium and swirl it for 30 seconds, just until it smells sweet and the butter foams. Burnt garlic cannot be rescued, so start the butter over.
Q: How many people does this recipe serve?
It serves six at 900 g (2 lb) steak and 900 g (2 lb) potatoes, about 150 g (5 oz) meat per plate. For four larger portions, keep the quantities and expect about 430 calories per serving. Halve everything for three servings.
Weigh the steak and potatoes, watch the pan temperature, and repeat the dish until the sear is automatic. Print the card, cook it once, and adjust the salt to your own taste.
Garlic & Herb Butter Steak Bites Over Creamy Mashed Potatoes 🥩🌿
Garlic and herb butter steak bites over creamy mashed potatoes: seared in 8 minutes, buttery, garlicky, and ready in 50 minutes for a weeknight dinner.
🧂 Ingredients
- 900 g (2 lb) sirloin steak, cut into 2.5 cm (1 inch) cubes
- 900 g (2 lb) russet potatoes, peeled and cut into 4 cm (1.5 inch) chunks
- 120 g (8 tbsp) unsalted butter, divided
- 120 ml (1/2 cup) whole milk, warmed
- 60 g (1/4 cup) sour cream, room temperature
- 6 garlic cloves, finely minced, divided
- 15 g (1 tbsp) fresh thyme leaves, chopped
- 10 g (2 tsp) kosher salt, divided, plus more to taste
- 3 g (1 tsp) freshly ground black pepper
- 15 ml (1 tbsp) neutral oil, such as canola
- 10 g (2 tbsp) fresh flat-leaf parsley, chopped
📋 Instructions
- 1Salt the steak — Pat 900 g (2 lb) of cubed sirloin dry and toss with 5 g (1 tsp) kosher salt. Rest 20 minutes at room temperature (the salt brines the surface so it browns faster).
- 2Boil the potatoes — Cover 900 g (2 lb) potato chunks with cold water by 3 cm (1 inch) and add 3 g (1/2 tsp) salt. Boil at 100°C (212°F) for 15 to 18 minutes, until a knife slides in with no resistance.
- 3Warm the dairy — Heat 120 ml (1/2 cup) milk and 60 g (4 tbsp) butter in a small pan at 60°C (140°F) until the butter melts. Keep warm (cold dairy makes the mash gluey).
- 4Mash the potatoes — Drain the potatoes and steam-dry 2 minutes, then rice or mash them with the warm dairy, 60 g (1/4 cup) sour cream, and 3 garlic cloves. Stir until smooth and glossy, then season to taste.
- 5Heat the skillet — Set a heavy 30 cm (12 inch) skillet over high heat with 15 ml (1 tbsp) oil until it shimmers and a water drop sizzles instantly, about 232°C (450°F).
- 6Sear batch one — Add half the steak cubes in a single layer and sear 2 minutes per side, 4 minutes total, until deep brown with an internal temperature of 52°C (125°F) for medium-rare. Move to a plate.
- 7Sear batch two — Sear the remaining cubes the same way, 4 minutes at 232°C (450°F), then return the first batch to the pan. The meat should feel springy, not firm, when pressed.
- 8Finish with garlic butter — Lower heat to medium and add 60 g (4 tbsp) butter, 3 garlic cloves, and 15 g (1 tbsp) thyme. Swirl 30 seconds until fragrant and foaming, then toss the steak to coat (garlic browns in under a minute).
- 9Plate and serve — Spoon the warm mash onto six plates, top with steak bites and pan butter, and scatter 10 g (2 tbsp) parsley. Serve immediately while the butter is still bubbling at the edges.
Tomasz writes precise, method-first recipes for breads, ferments, and slow braises, drawing on Polish and Central European home cooking. He cares about weights, temperatures, and timing, and explains the reason behind each step so cooks can repeat results. His angle is turning fussy techniques into clear, checkable instructions.