The most popular Philly cheesesteak toppings are griddled onions, peppers and sautéed mushrooms. Onions add sweetness and moisture, peppers bring heat or a brighter flavour, and mushrooms contribute an earthy, savoury character.

You do not need to add all three. A classic cheesesteak can be as simple as beef, melted cheese and optional onions. The best toppings are the ones that complement the steak without overpowering it or making the roll too wet.

Philly Cheesesteak Toppings at a Glance

Are Onions Traditional on a Philly Cheesesteak?

Yes. Griddled or sautéed onions are the topping most closely associated with a traditional Philly cheesesteak.

Onions are optional rather than mandatory, which is why cheesesteaks are commonly ordered “wit” or “witout” onions. Their sweetness balances the saltiness of the beef and cheese, while their soft texture blends naturally into the filling.

According to Visit Philadelphia:

“Other common toppings include sautéed onions, cooked mushrooms, ketchup and sweet or hot peppers.”

This distinction is important: beef, cheese and bread create the foundation of the sandwich, while onions and other additions allow diners to adjust its flavour and texture.

For a complete explanation of “wit,” “witout” and traditional ordering terminology, read our guide to ordering a Philly cheesesteak.

What Kind of Onions Are Best?

Yellow onions are usually the most practical choice because they soften well and develop a mild sweetness on the griddle. White onions provide a slightly sharper flavour, while red onions are less common because their sweetness and colour can change the character of the sandwich.

The onions should be cooked until tender and lightly browned. They do not need to become deeply caramelized, but they should lose their raw bite before being combined with the beef.

Why Onions Work So Well

Properly cooked onions add:

• Gentle sweetness
• Moisture without relying on sauce
• A soft texture that mixes easily with thin beef
• Additional browned flavour from the griddle

The best onions support the steak rather than becoming a separate, dominant layer.

Should Onions Be Cooked with the Beef?

Onions can be cooked separately and mixed into the beef near the end, or they can share the griddle once they have started softening.

Cooking them separately at first provides better control because onions usually take longer than thinly sliced beef. If both ingredients are added at the same time, the meat may overcook before the onions become tender.

Once the onions have softened, combining them with the steak allows the flavours to mix before the cheese is melted over the filling.

Do Peppers Belong on a Philly Cheesesteak?

Peppers are a common cheesesteak topping, but the type of pepper matters.

In Philadelphia-style cheesesteaks, hot peppers, sweet peppers, cherry peppers and Italian long hots are more closely associated with the sandwich than large quantities of green bell pepper. Bell peppers are common in cheesesteak-inspired recipes outside Philadelphia, but they are not essential to a classic version.

Hot Peppers

Hot peppers add heat and acidity, cutting through the richness of the beef and melted cheese. They are particularly useful when the sandwich contains creamy American cheese or Cheez Whiz.

Choose hot peppers if you want:

• Noticeable heat
• A sharper, more energetic flavour
• Acidity to balance rich cheese
• Contrast against sweet onions

Sweet Peppers

Sweet peppers provide a gentler flavour. They add mild sweetness without the intensity of hot peppers and work well for diners who want more vegetables without making the sandwich spicy.

Choose sweet peppers if you want:

• A mild pepper flavour
• Additional sweetness
• Soft texture
• Less heat than hot or pickled peppers

Pickled Peppers

Pickled peppers contribute both heat and acidity. They can make a cheese-heavy sandwich feel less rich, but they should be drained before use to prevent the bread from becoming soggy.

What About Green Bell Peppers?

Green bell peppers are frequently used in cheesesteak-inspired sandwiches, particularly outside Philadelphia. They add a fresh vegetal flavour and a slight bitterness that can balance sweet onions.

However, they are not required for an authentic cheesesteak. In fact, Visit Philadelphia notes that bell peppers are typically less favoured than sweet peppers or Italian long hots in traditional Philadelphia cheesesteak shops.

If you enjoy green peppers, they can still work well when sliced thinly and cooked until tender. Large pieces of firm pepper can interrupt the texture of the sandwich and make it more difficult to eat.

Are Mushrooms Good on a Philly Cheesesteak?

Mushrooms are one of the most popular optional cheesesteak toppings. Their earthy flavour reinforces the savoury character of the beef without adding sweetness or significant heat.

They work especially well with provolone because the cheese’s more noticeable flavour can stand up to the mushrooms. American cheese is another good pairing when you want the mushrooms to remain more prominent.

Choose mushrooms if you want:

• A deeper savoury flavour
• A soft but substantial texture
• More filling without extra heat
• An earthy pairing for provolone or American cheese

How Should Mushrooms Be Cooked?

Mushrooms should be sliced and cooked over relatively high heat until their released moisture evaporates and their surfaces begin to brown.

If mushrooms are crowded together or removed too early, they may release water directly into the sandwich. This can dilute the flavour and soften the bread.

For the best texture:

1. Slice the mushrooms evenly.
2. Place them on a hot cooking surface.
3. Avoid overcrowding the pan or griddle.
4. Allow their moisture to evaporate.
5. Mix them with the beef only after they begin to brown.

The goal is to add concentrated mushroom flavour, not additional water.

Onions vs Peppers vs Mushrooms: Which Should You Choose?

The right topping depends on what you want to change about the sandwich.

Choose onions when you want sweetness, moisture and the most classic topping experience.

Choose hot or pickled peppers when you want heat and acidity to balance the richness of the cheese.

Choose sweet peppers when you prefer a mild vegetable flavour without significant heat.

Choose mushrooms when you want a deeper savoury flavour and a more substantial filling.

If you are trying a Philly cheesesteak for the first time, onions are the safest starting point. Peppers and mushrooms can then be added according to your preferred level of heat, sweetness and savouriness.

Best Philly Cheesesteak Topping Combinations

The best combinations create contrast without overcrowding the sandwich.

Onions and American Cheese

This is a balanced, approachable combination. The onions add sweetness while American cheese creates a smooth, mild and cohesive filling.

Onions and Provolone

Provolone contributes more cheese flavour, while the onions soften its sharper or saltier qualities. This combination is ideal for diners who want the cheese to remain noticeable.

Onions and Cheez Whiz

Sweet onions balance the saltiness and tang of Cheez Whiz. Because both ingredients add moisture, the portions should remain controlled.

If cheese selection is your main concern, our guide to the best cheeses for a Philly cheesesteak compares Cheez Whiz, American cheese, provolone and Cooper Sharp.

Onions and Mushrooms

This combination produces a savoury sandwich with mild sweetness and no significant heat. Both toppings should be browned properly to avoid adding too much moisture.

Onions and Hot Peppers

Sweet onions and hot peppers create a useful contrast. The onions soften the heat, while the peppers prevent the sandwich from tasting overly rich.

Onions, Peppers and Mushrooms

Adding all three creates a fully loaded cheesesteak with sweetness, heat and earthy flavour. The portions should be smaller than they would be when using only one topping.

A fully loaded sandwich works best when the beef remains visible and the cheese can still reach the meat. If the vegetables form a thick separate layer, the sandwich may lose its cohesive texture.

Can You Add Ketchup or Other Sauces?

Ketchup is a recognized cheesesteak topping. It contributes sweetness and acidity and can work particularly well with onions and American cheese.

However, it should be applied lightly. Too much ketchup can cover the flavour of the beef and make the bread wet.

Other sauces such as mayonnaise, hot sauce or garlic sauce can be used in modern variations, but they are not necessary for a well-balanced cheesesteak. The melted cheese, beef juices and cooked onions should already provide moisture.

What About Lettuce and Tomato?

Lettuce, tomato and mayonnaise are more closely associated with a cheesesteak hoagie, which combines hot cheesesteak filling with cold hoagie toppings.

These additions create a fresher and crunchier sandwich, but they also move the result away from the simple hot cheesesteak format. Tomatoes can release moisture, while lettuce may wilt quickly against the hot beef.

If lettuce and tomato are used, they should be added immediately before serving and kept separate from the griddle.

How Many Toppings Should You Add?

One or two toppings are usually enough to give a cheesesteak a distinct flavour without overwhelming the beef and cheese.

A useful approach is to select toppings by function:

• One topping for sweetness, such as onions
• One topping for heat or acidity, such as hot peppers
• One topping for extra savouriness, such as mushrooms

You do not need all three functions in every sandwich. When using multiple toppings, reduce the portion of each one so the roll remains easy to hold and the beef stays central.

Should Toppings Be Mixed into the Beef?

Cooked onions, peppers and mushrooms usually work best when mixed with the beef shortly before the cheese is added.

Mixing distributes the toppings throughout the filling, so each bite contains a more consistent balance of meat, cheese and vegetables. It also prevents large pieces from falling out of the sandwich.

Pickled peppers and cold toppings are better added after cooking. Heating them for too long can reduce their acidity or release unnecessary moisture.

Common Cheesesteak Topping Mistakes

Adding Too Many Toppings

A cheesesteak should still taste primarily of beef and cheese. Too many vegetables and sauces can turn it into a general steak sandwich rather than a cohesive cheesesteak.

Leaving Vegetables Undercooked

Raw or firm onions, mushrooms and peppers create a harsh contrast with the tender beef. Cook them until soft and lightly browned.

Allowing Mushrooms to Stay Watery

Mushrooms should release and evaporate their moisture before entering the sandwich. Otherwise, the bread may become soggy.

Using Too Much Sauce

Sauces should support the beef rather than cover it. A light application is usually sufficient.

Cutting the Vegetables Too Large

Thin slices and small pieces blend with the beef more successfully. Large vegetables make the sandwich harder to eat and prevent even topping distribution.

Forgetting the Cheese-Topping Balance

Strong toppings need an appropriate cheese. Hot peppers pair well with creamy cheese, while mushrooms can support a more flavourful provolone.

Are Toppings the Difference Between a Cheesesteak and a Steak Sandwich?

Not by themselves. The main distinction involves the preparation of the beef, the role of melted cheese, the bread and how the ingredients are integrated.

A general steak sandwich may contain thicker pieces of steak, leafy greens, tomatoes or a broader selection of sauces. A Philly cheesesteak usually centres on thin griddled beef, melted cheese and a limited number of cooked toppings.

Our Philly cheesesteak vs steak sandwich guide explains these differences in more detail.

Frequently Asked Questions

What are the most popular Philly cheesesteak toppings?

Griddled onions are the most closely associated topping. Mushrooms, hot peppers, sweet peppers, ketchup and pickled peppers are also common additions.

Are onions required on a Philly cheesesteak?

No. Onions are optional, which is why cheesesteaks may be ordered with or without them. However, they are the most traditional and widely used topping.

Are bell peppers traditional on a Philly cheesesteak?

Bell peppers appear in many cheesesteak-inspired recipes, but they are not essential to a traditional Philadelphia cheesesteak. Sweet peppers and Italian long hots are more closely associated with Philadelphia variations.

Should mushrooms be cooked separately?

It is usually better to cook mushrooms separately at first so their moisture can evaporate. They can then be mixed with the beef before adding the cheese.

Can you put onions, peppers and mushrooms on the same cheesesteak?

Yes. The combination creates sweetness, heat and savoury depth, but smaller portions of each topping should be used to avoid overcrowding the sandwich.

What topping goes best with provolone?

Onions and mushrooms both pair well with provolone. Onions balance its stronger flavour with sweetness, while mushrooms reinforce its savoury character.

What topping goes best with Cheez Whiz?

Griddled onions are a strong choice because their sweetness balances the salty and tangy flavour of Cheez Whiz.

Final Verdict: Which Cheesesteak Toppings Are Best?

Griddled onions are the best starting point because they add sweetness, moisture and a classic cheesesteak character without overpowering the beef.

Peppers are ideal when you want heat, acidity or mild sweetness, while mushrooms add earthy, savoury depth. You can combine all three, but a balanced cheesesteak should still allow the beef and melted cheese to remain the main flavours.

The best topping combination is not necessarily the one with the most ingredients. It is the combination that creates contrast, stays evenly distributed and keeps the sandwich cohesive from the first bite to the last.

Try a Philly Steak Sandwich at Grill Gate

Ready to find your favourite combination? Visit Grill Gate for a hot, freshly prepared Philly steak sandwich with seasoned beef, melted cheese and satisfying toppings.

Find your nearest Grill Gate location in Richmond Hill, North York–Sheppard, North York–Yonge Street or Aurora.