Flat iron steak is a flavorful cut that often surprises people with its tenderness and rich taste. While it’s usually grilled or pan-seared, slow cooking this cut unlocks a whole new level of juicy, melt-in-your-mouth goodness. By cooking it low and slow, we break down the fibers, making every bite incredibly tender without losing that bold beefy flavor.
This flat iron steak slow cook recipe is perfect for busy days when we want a hearty meal waiting for us at the end. It’s simple to prepare, requires minimal hands-on time, and fills the kitchen with irresistible aromas. Whether you’re meal prepping or looking for an easy dinner idea, this recipe delivers consistent, delicious results that will quickly become a favorite in our household.
Ingredients
To achieve the perfect Flat Iron Steak Slow Cook, it is essential to gather high-quality ingredients that enhance the steak’s natural tenderness and rich flavor. Below, we break down what you’ll need for the steak itself, the marinade, and the additional seasonings and sauces that bring everything together.
Flat Iron Steak
- 2 lbs flat iron steak (trimmed of excess fat and evenly sliced if preferred for serving)
- Choose well-marbled meat for the best tenderness and juiciness after slow cooking
Marinade Ingredients
Our marinade infuses the steak with bold flavor while aiding in the slow cooking process to tenderize the meat perfectly. Use fresh and balanced components.
| Ingredient | Amount | Notes |
|---|---|---|
| Olive oil | 1/4 cup | Extra virgin for maximum flavor |
| Soy sauce | 1/4 cup | Adds umami depth |
| Worcestershire sauce | 2 tbsp | Enhances richness and complexity |
| Garlic | 4 cloves | Minced fresh for pungent aroma |
| Balsamic vinegar | 2 tbsp | Balances sweetness and acidity |
| Brown sugar | 1 tbsp | Slight sweetness for caramelization |
| Fresh black pepper | 1 tsp | Ground freshly for sharpness |
| Smoked paprika | 1 tsp | Optional, for a subtle smoky note |
Additional Seasonings and Sauces
To maximize flavor complexity, sprinkle and serve with the following:
- Kosher salt: 1 tsp, to season steak just before cooking
- Onion powder: 1/2 tsp, for subtle savory depth
- Crushed red pepper flakes: 1/4 tsp, if we want a gentle kick
- Fresh herbs: such as rosemary or thyme, 2 sprigs for aromatic infusion during slow cook
- Optional finishing sauce: a light drizzle of steak sauce or chimichurri complements the tender slow-cooked flat iron steak
These carefully selected ingredients work harmoniously to highlight the flat iron steak’s bold flavor and melt-in-your-mouth texture through our slow cooking method.
Equipment Needed
To master the Flat Iron Steak Slow Cook Recipe, having the right equipment is essential. These tools help us ensure precise preparation, efficient cooking, and the best flavor extraction from our steak.
Slow Cooker
A reliable slow cooker is the heart of this recipe. It maintains a consistent low temperature allowing the flat iron steak to tenderize slowly while absorbing the marinade’s rich flavors.
- Choose a slow cooker with at least 4 to 6-quart capacity to accommodate a 2 lbs flat iron steak comfortably.
- Prefer models with adjustable heat settings like low, high, and warm.
- Ensure the removable crock is dishwasher-safe for easy cleaning.
Cutting Board and Knife
Proper slicing before and after cooking influences texture and presentation.
- Use a sturdy cutting board—preferably wood or BPA-free plastic—for safe meat handling.
- A sharp chef’s knife or carving knife is vital for clean cuts.
- Keep the knife honed to slice the steak against the grain, maximizing tenderness.
Measuring Cups and Spoons
Accurate seasoning and marinade proportions make all the difference.
| Equipment | Purpose | Typical Size/Measurement |
|---|---|---|
| Measuring Cups | For liquids and bulk ingredients | 1 cup, 1/2 cup, 1/4 cup |
| Measuring Spoons | For precise seasoning quantities | 1 tbsp, 1 tsp, 1/2 tsp, 1/4 tsp |
We recommend dedicated sets with clear markings for consistency. Dry and liquid measuring tools help us measure ingredients like soy sauce, olive oil, and seasonings precisely to ensure every bit of flavor shines through in our slow-cooked steak.
Preparation
Let’s get everything ready to achieve a perfectly tender and flavorful Flat Iron Steak Slow Cook. This preparation stage sets the foundation for a mouthwatering slow-cooked masterpiece.
Preparing the Flat Iron Steak
- Start with a well-marbled 2 lbs flat iron steak. This cut’s marbling ensures juiciness throughout the slow cooking process.
- Pat the steak dry with paper towels to remove excess moisture. This helps the marinade adhere better.
- Trim any thick silver skin or excess fat, but leave a thin layer to preserve flavor.
- Use a sharp knife to score the surface lightly in a crisscross pattern. This technique allows deeper marinade penetration without compromising texture.
Making the Marinade
We create a robust marinade that enhances the steak’s bold flavor and tender texture during slow cooking. Combine the following ingredients precisely for a balanced taste:
| Ingredient | Measurement | Purpose |
|---|---|---|
| Olive oil | 1/4 cup | Moisture and fat binding |
| Soy sauce | 1/4 cup | Umami and saltiness |
| Worcestershire sauce | 2 tablespoons | Depth and complexity |
| Minced garlic | 3 cloves | Aromatic pungency |
| Balsamic vinegar | 2 tablespoons | Sweet and tangy acidity |
| Brown sugar | 1 tablespoon | Caramelization and balance |
| Black pepper | 1 teaspoon | Subtle heat and aroma |
| Smoked paprika | 1/2 teaspoon | Optional smoky undertone |
- Whisk all ingredients in a bowl until well blended.
- This marinade will tenderize the flat iron steak while infusing it with balanced layers of flavor.
Marinating the Steak
- Place the prepared flat iron steak in a large resealable plastic bag or shallow dish.
- Pour the marinade over the steak ensuring it’s fully coated.
- Seal the bag or cover the dish tightly with plastic wrap.
- Refrigerate for minimum 4 hours but ideally overnight for maximum flavor infusion.
- Turn the steak halfway through marinating to ensure even distribution.
Cooking Instructions
Follow these precise steps to slow cook the Flat Iron Steak to perfection. Our method ensures maximum tenderness and flavor with minimal effort.
Setting Up the Slow Cooker
- Prepare the Slow Cooker:
Use a slow cooker with a 4 to 6-quart capacity, set it on a stable surface near your kitchen workspace.
- Add Liquid Base:
Pour 1/2 cup of reserved marinade into the slow cooker’s base. This moisture barrier prevents the steak from drying and enhances flavor absorption.
- Position the Steak:
Place the marinated 2 lbs flat iron steak flat and centered in the slow cooker. Avoid overcrowding or folding the steak to ensure even cooking.
- Optional Flavor Boost:
Scatter fresh herbs like thyme or rosemary around the steak for an extra aromatic touch during cooking.
Slow Cooking the Steak
- Set the Temperature:
Select Low heat setting on your slow cooker. Cooking low and slow breaks down the steak’s fibers gently.
- Cooking Duration:
Cook the flat iron steak for 6 to 8 hours depending on your desired tenderness:
| Desired Tenderness | Cooking Time | Internal Temperature* |
|---|---|---|
| Medium Rare | 6 hours | 130°F (54°C) |
| Medium | 7 hours | 140°F (60°C) |
| Well Done | 8 hours | 160°F (71°C) |
*Check temperature with an instant-read thermometer.
- Avoid Opening the Lid:
Refrain from lifting the lid during cooking as it causes heat loss and prolongs the cooking time. Trust the slow cooker’s consistent heat.
Checking for Doneness
- Use a Thermometer:
Insert an instant-read thermometer into the steak’s thickest part to accurately gauge doneness.
- Visual and Texture Check:
The steak should display a rich color from the marinade, and the surface should feel tender with slight give when pressed.
- Adjust Cooking Time if Needed:
If your steak hasn’t reached the desired tenderness, continue slow cooking in 30-minute increments and recheck.
- Rest the Steak:
Remove the steak from the slow cooker and let it rest on a cutting board for 10 minutes. This allows juices to redistribute, maximizing juiciness.
By adhering to these steps we ensure that our Flat Iron Steak Slow Cook Recipe delivers memorable flavor and melt-in-your-mouth texture every time.
Serving Suggestions
To maximize the enjoyment of our Flat Iron Steak Slow Cook Recipe, proper serving techniques and complementary sides are essential. Let’s explore how resting, slicing, and pairing can make this dish unforgettable.
Resting the Steak
Allowing the steak to rest after slow cooking is crucial. We recommend resting the flat iron steak for at least 10 minutes. This step lets the juices redistribute throughout the meat, ensuring every bite is succulent and flavorful rather than dry.
Remember:
- Rest steak loosely covered with foil.
- Avoid slicing too soon to prevent juice loss.
- Resting enhances tenderness and juiciness.
Slicing Techniques
How we slice the Slow Cooked Flat Iron Steak impacts texture and dining experience dramatically. Here’s what we do:
| Step | Instruction |
|---|---|
| Use sharp knife | Ensure a sharp, sturdy knife for clean cuts. |
| Identify grain | Observe the direction of the muscle fibers (grain). |
| Cut against grain | Slice perpendicular to the grain to shorten fibers. |
| Slice thickness | Aim for ¼-inch thick slices for ideal chew. |
By slicing against the grain we break down muscle fibers, making the steak easier to chew and amplifying its tenderness.
Recommended Side Dishes
Pairing our flat iron steak slow cook recipe with the right sides elevates the meal. We prefer:
- Garlic mashed potatoes — creamy and rich, they balance the steak’s bold flavor.
- Roasted seasonal vegetables — like carrots, Brussels sprouts, or asparagus for added texture and nutrients.
- Fresh garden salad — with vinaigrette to cut through the richness.
- Warm dinner rolls — perfect for soaking up any leftover juices.
| Side Dish | Flavor Profile | Purpose |
|---|---|---|
| Garlic Mashed Potatoes | Creamy, buttery | Balances bold steak flavor |
| Roasted Vegetables | Earthy, caramelized | Adds texture and freshness |
| Garden Salad | Crisp, tangy | Cuts richness |
| Warm Dinner Rolls | Soft, fluffy | Absorbs flavorful juices |
Combining these sides with our Slow Cooked Flat Iron Steak results in a well-rounded satisfying meal perfect for any occasion.
Storage and Leftovers
Proper storage and thoughtful handling of leftovers keep our Flat Iron Steak Slow Cook Recipe flavorful and tender for meals beyond the first serving. Let’s ensure our slow-cooked steak stays fresh and delicious.
Cooling and Storing
We start by allowing the slow-cooked flat iron steak to cool at room temperature for no longer than 2 hours to prevent bacterial growth. After cooling, wrap the steak tightly in aluminum foil or place it in an airtight container to lock in moisture and flavor.
For best quality, refrigerate the steak within this timeframe. It will stay fresh in the fridge for 3 to 4 days. If we want to keep it longer, freezing is an ideal option; use freezer-safe containers or heavy-duty freezer bags, removing as much air as possible.
| Storage Method | Temperature | Duration | Key Tips |
|---|---|---|---|
| Refrigeration | 35°F to 40°F (1.6°C to 4.4°C) | 3 to 4 days | Use airtight containers or foil |
| Freezing | 0°F (-18°C) or below | Up to 3 months | Wrap tightly, remove excess air |
Note: Labeling containers with the date of storage helps us track freshness easily.
Reheating Tips
Reheating our slow-cooked flat iron steak properly preserves its tender texture and rich flavor. Avoid overheating, which can toughen the meat and dry it out.
Here’s how we reheat for best results:
- Oven Method: Preheat the oven to 250°F (120°C). Wrap slices of steak in foil with a splash of beef broth or reserved marinade. Heat for about 15 to 20 minutes until warmed through.
- Stovetop Method: Warm a skillet over low heat. Add a small amount of olive oil or butter. Gently reheat steak slices for 2 to 3 minutes per side, adding a little broth to maintain moisture.
- Microwave Method: Use the microwave only if short on time. Place steak slices on a microwave-safe plate, cover loosely with a damp paper towel, and heat in 30-second intervals until just warm.
“Gentle reheating retains the steak’s melt-in-your-mouth texture and bold flavors, making leftovers just as enjoyable as the first serving.”
Following these storage and reheating tips allows us to enjoy our Flat Iron Steak Slow Cook Recipe several times, whether for quick lunches or easy dinners.
Conclusion
Slow cooking flat iron steak unlocks a depth of flavor and tenderness that’s hard to beat. With minimal effort and simple ingredients, we can create a meal that’s both satisfying and versatile.
Whether for a busy weeknight or meal prepping, this recipe delivers consistent, juicy results every time. Embracing the slow cooker method lets us enjoy a rich, melt-in-your-mouth steak experience without the fuss.
Give it a try and savor the difference that patience and quality ingredients bring to your dinner table.
Frequently Asked Questions
What makes flat iron steak ideal for slow cooking?
Flat iron steak is well-marbled and flavorful. Slow cooking breaks down its fibers gently, making it tender and juicy while preserving its bold taste.
What ingredients are needed for the marinade?
The marinade includes olive oil, soy sauce, Worcestershire sauce, minced garlic, balsamic vinegar, brown sugar, black pepper, and optional smoked paprika, enhancing moisture and flavor.
How long should I marinate the steak?
Marinate the steak for at least 4 hours, but preferably overnight, to allow flavors to fully penetrate the meat.
What slow cooker size is recommended?
A slow cooker with a capacity of 4 to 6 quarts and adjustable heat settings is ideal for cooking a 2 lbs flat iron steak.
How long should I cook the flat iron steak in the slow cooker?
Cook on low heat for 6 to 8 hours, depending on your preferred tenderness level, without opening the lid during cooking.
How should I slice the steak after cooking?
Rest the steak for 10 minutes and then slice it against the grain into ¼-inch thick slices to maximize tenderness.
What sides pair well with slow-cooked flat iron steak?
Garlic mashed potatoes, roasted seasonal vegetables, fresh garden salad, and warm dinner rolls complement the steak well.
How do I store leftover slow-cooked flat iron steak?
Cool leftovers at room temperature no longer than 2 hours, then refrigerate tightly wrapped or in an airtight container for 3-4 days.
Can I freeze the leftover steak?
Yes, wrap it properly in foil or freezer bags, label it, and freeze. It keeps well for longer storage.
What is the best way to reheat the steak?
Reheat gently in the oven, on the stovetop, or microwave using low heat to preserve texture and flavor.