Beef flank steak protein is ~22–24 g per 3 oz cooked, or ~27 g per 100 g, with trimming and doneness affecting the final number.
Looking for a lean cut that still brings plenty of protein? Flank steak fits that bill. It’s a long, grainy muscle from the abdominal area with bold flavor, a firm bite, and a tidy fat profile when trimmed. Cook it hot and fast, slice thin against the grain, and you’ll get a compact portion that carries a lot of protein for the calories. Below, you’ll find serving-by-serving numbers, cooked vs. raw differences, and ways to make those grams count inside balanced meals.
Protein At A Glance (Serving Sizes You’ll Actually Use)
Protein numbers shift with trimming and cooking losses, so the chart below gives practical, rounded ranges you can cook to. These ranges reflect common lab entries for flank steak in major nutrient datasets and cut guides, then expressed per everyday portions.
| Serving | Protein (g) | Notes |
|---|---|---|
| 1 oz cooked | ~7–8 | Handy for adding to bowls or salads. |
| 2 oz cooked | ~15 | Small taco filling or sandwich portion. |
| 3 oz cooked | ~22–24 | Dietitian-style serving size. |
| 4 oz cooked | ~29–32 | Common dinner plate portion. |
| 100 g cooked | ~27 | Easy metric reference for food scales. |
| 100 g raw | ~24 | Moisture loss at cooking concentrates protein by weight. |
| 8 oz cooked steak | ~58–64 | Large shareable steak sliced across the grain. |
What Flank Steak Is And Why It Eats Lean
Flank is a boneless, lean cut with long, visible fibers. That grain explains why slicing matters. Cut across those fibers and you’ll get a tender bite even at medium-rare to medium. The lean build shows up in the macros: minimal carbohydrate, modest fat when trimmed, and a generous hit of protein for the calories. Marinating adds flavor and a little moisture buffer without changing the protein content in a big way.
Beef Flank Steak Protein Per Ounce And Per 100g
Here’s how to read common labels and databases. When you see flank steak listed per 100 g cooked at roughly 27 g protein, that lines up neatly with about 7–8 g per cooked ounce. A standard 3-oz cooked portion lands near 22–24 g. Raw weight tells a different story, because water cooks off; raw 100 g sits closer to ~24 g protein. Different doneness levels and trimming can nudge numbers around the edges, but the basic math stays steady.
That makes meal planning simple. Need 30 g? Plate 4 oz cooked. Want to boost a lunch bowl by ~15 g? Fold in 2 oz cooked strips. If you batch-cook on the weekend, portion in clear containers by ounce or by 100 g and label them. Hitting targets turns into grab-and-go routine rather than guesswork.
Cooked Vs. Raw Weight: Why The Numbers Change
Protein doesn’t evaporate. Water does. During searing or broiling, moisture leaves the meat, so each gram of finished steak carries a little more protein by weight than the raw piece. That’s why a database can show ~24 g per 100 g raw but ~27 g per 100 g cooked. If you track intake, pick one basis and stay consistent in your log—either weigh after cooking or log from raw weight with a reliable yield.
How To Slice For The Best Texture
Lay the steak so the long muscle fibers run side to side on your board. Rotate the slab so your knife crosses those fibers at a right angle. Slice thin. This quick move reduces chew and keeps those lean, protein-dense bites pleasant in tacos, rice bowls, and stir-fries.
Beef Flank Steak Protein: Cooked Vs Raw
Let’s put both views on one page. Raw, trimmed flank steak trends around the mid-20s for protein per 100 g. After cooking, that rises into the high-20s per 100 g thanks to water loss. Portion sizes translate cleanly: 3 oz cooked gives a tidy ~22–24 g, and 4 oz cooked reaches ~30 g. If you’re logging macros, pick “cooked, broiled/grilled” entries for finished meat; if you weigh raw, stick to raw entries and apply the same method each time.
What About Fat And Calories?
Trimmed flank sits on the leaner side of beef. That means fewer calories per gram than many marbled steaks, with protein carrying the load. If you’re counting calories, flank steak makes it easier to build a high-protein plate without a high energy cost, especially when paired with vegetables and intact grains.
Protein Targets And How Flank Steak Helps You Hit Them
Daily protein needs vary with body size and goals. A widely used baseline is 0.8 g per kilogram of body weight per day. Many active people choose higher targets, but that baseline helps you anchor a plan. Using the cooked 3-oz flank portion at ~23 g, you can map how many portions cover your day. Add dairy, eggs, legumes, and fish to round things out while keeping meals interesting.
You can see a government summary of protein needs at the RDA overview. For cut anatomy and prep tips, the beef industry’s page on flank steak is a handy primer. If you prefer nutrient tables, USDA materials include flank entries in their protein reference.
Smart Ways To Build A Plate Around Flank Steak
- Taco night, portion-aware: 2 oz cooked strips in corn tortillas with salsa, onions, and cilantro for ~15 g protein before toppings.
- Stir-fry bowl: 3–4 oz cooked strips over rice with snow peas and bell peppers for ~22–30 g protein.
- Salad upgrade: 3 oz over greens with cherry tomatoes and a citrusy vinaigrette for ~22–24 g protein.
- Meal-prep bento: 100 g cooked slices with quinoa and broccoli for ~27 g protein.
Marinade And Doneness Tips
Use a simple blend of soy, lime, garlic, and a touch of oil. Pat dry before cooking so the surface sears. Aim for medium-rare to medium to keep the fibers supple. Rest the steak for five minutes, then slice thin across the grain. These small steps won’t alter protein counts in a big way, but they transform texture and flavor, which helps you stick with your plan.
How Flank Compares To Other Proteins You Eat
Flank steak sits with other lean beef cuts on the protein-dense end of the spectrum. Skinless poultry breast and many fish fillets run even leaner by calories. Legumes add fiber and micronutrients with moderate protein per cooked cup. Mixing sources across the week keeps micronutrients diverse while still making room for steak night.
Shopping And Trimming For Macro Consistency
- Buy by weight, portion by ounce: Choose whole pieces you can divide after cooking. Label containers by ounce or grams.
- Trim surface fat before cooking: This keeps your numbers closer to the “lean only” entries you see in nutrient databases.
- Stay consistent: If you log cooked weight one week, don’t switch to raw the next. Consistency beats perfect math.
Daily Protein Needs And Flank Steak Portions
Use this quick planner to map the baseline 0.8 g/kg target to everyday portions. The “3-oz servings” column assumes ~23 g protein per serving of cooked flank. Treat it as a planning tool, not a rigid rule set.
| Body Weight | RDA Protein (g/day) | Flank Steak (3-oz Servings) |
|---|---|---|
| 50 kg (110 lb) | ~40 g | ~2 servings |
| 60 kg (132 lb) | ~48 g | ~2–3 servings |
| 70 kg (154 lb) | ~56 g | ~2–3 servings |
| 80 kg (176 lb) | ~64 g | ~3 servings |
| 90 kg (198 lb) | ~72 g | ~3–4 servings |
| 100 kg (220 lb) | ~80 g | ~3–4 servings |
| 110 kg (242 lb) | ~88 g | ~4 servings |
Putting It All Together
Here’s the simple play. Batch-cook flank steak once or twice a week. Portion by cooked ounces or by 100 g. Keep sliced containers in the fridge for bowls, salads, tacos, and stir-fries. Use the ranges above to keep protein steady across days. Pair with colorful sides, whole grains, and a mix of plant proteins through the week.
Key Takeaways You Can Use Tonight
- Per ounce cooked: ~7–8 g protein. Easy to scale up or down.
- Per 3 oz cooked: ~22–24 g protein. A neat target for most plates.
- Per 100 g cooked: ~27 g protein. Great for metric meal prep.
- Slice against the grain: Better texture, same protein.
- Consistency wins: Log cooked or raw, then stick with it.
FAQ-Free Notes For Searchers Who Landed Here For One Thing
If your query was “beef flank steak protein,” the short version is simple: 3 oz cooked clocks ~22–24 g, while 100 g cooked lands near ~27 g. If your query was “how much protein in flank steak per ounce,” plan for ~7–8 g per cooked ounce. Those two anchors will cover almost every home recipe you’re making this week.
If you track exact numbers for performance or medical reasons, log entries that match your kitchen: “cooked, broiled/grilled, trimmed” for finished meat; “raw, trimmed” if you weigh before cooking. The same entry each week beats chasing tiny differences between charts.
Last tip: keep a small scale on the counter on meal-prep day. Portion a few 3-oz and 4-oz packets. Your macros will stop being guesswork, and steak night will still taste like steak night.
With these tools, dialing in beef flank steak protein becomes routine. Build plates you enjoy, keep portions steady, and let the numbers do the quiet work in the background.