Vegan Philly Cheesesteaks

My skeptical brother-in-law took one bite of these cheesesteaks and actually asked what kind of beef I used. That moment when someone's eyes light up because plant-based food surprised them, that's the magic right there. I've been perfecting this recipe for years, tweaking the cheese sauce until it got that perfect gooey pull and nailing the mushroom cooking time so they're meaty without being mushy.

Last summer, I made these for a backyard cookout when my friend Sarah brought over her notoriously picky toddler. The kid devoured two halves and kept pointing at the pan asking for more of the cheese stuff. Watching a three year old get excited about peppers and onions, that's when I knew this recipe was a keeper for feeding anyone, no matter their food preferences.

Ingredients

• 2 tablespoons olive oil: Divide between cooking the vegetables and mushrooms, this helps everything get those beautiful golden edges without sticking
• 1 large yellow onion, thinly sliced: Thin slices melt down into sweet ribbons that weave through the sandwich like perfect little flavor threads
• 1 large green bell pepper and 1 large red bell pepper, thinly sliced: The duo adds both visual appeal and a sweet crunch that balances the rich cheese sauce
• 400 g (14 oz) portobello mushrooms, thinly sliced: These are the star, providing that substantial meaty texture that makes this sandwich feel satisfying and hearty
• 2 cloves garlic, minced: Fresh garlic right at the end adds that aromatic punch that elevates the whole dish
• 1 teaspoon smoked paprika: This brings a subtle smokiness that hints at the traditional cheesesteak experience without any meat
• 1 teaspoon soy sauce or tamari: The secret umami bomb that makes the mushrooms taste deeply savory and satisfying
• 1/2 teaspoon freshly ground black pepper and 1/2 teaspoon sea salt: Simple seasonings that let the vegetables shine while keeping everything balanced
• 1 cup unsweetened soy or oat milk: The base for our cheese sauce, oat milk creates an especially creamy result while soy adds protein
• 2 tablespoons nutritional yeast: Essential for that cheesy, nutty flavor that makes vegan cheese sauces actually taste like cheese
• 2 teaspoons cornstarch: The thickening agent that transforms the milk into a luscious, pourable sauce
• 1 tablespoon vegan butter or olive oil: Adds richness to the cheese sauce and helps it coat every bite perfectly
• 1/2 teaspoon garlic powder, 1/2 teaspoon onion powder, and 1/4 teaspoon turmeric: The flavor trifecta that gives the cheese sauce depth and that appetizing golden color
• 1/2 teaspoon salt: Brings all the cheese sauce flavors together and makes it pop
• 4 soft hoagie rolls or sub rolls: The foundation, look for rolls that are sturdy enough to hold everything but soft enough to bite through easily

Instructions

Caramelizing the vegetables:

Heat 1 tablespoon olive oil in a large skillet over medium heat. Add the onions and both bell peppers, stirring occasionally for 5 to 7 minutes until they're softened and just starting to brown. Remove them from the pan and set aside on a plate.

Cooking the mushrooms:

Add the remaining tablespoon of olive oil to the same skillet. Toss in the sliced mushrooms and cook for 5 to 7 minutes, watching them transform as they release their moisture and develop gorgeous golden brown edges.

Building the flavor base:

Stir in the minced garlic, smoked paprika, soy sauce, black pepper, and salt. Let everything cook together for just 1 minute until fragrant. Return the sautéed onions and peppers to the pan, mix well, and cook for another 2 minutes to let all the flavors marry.

Making the cheese sauce:

In a small saucepan, whisk together the soy or oat milk, nutritional yeast, cornstarch, vegan butter, garlic powder, onion powder, turmeric, and salt. Place over medium heat, whisking continuously until the sauce thickens and becomes creamy, about 3 to 5 minutes. Remove from heat once it coats the back of a spoon.

Preparing the rolls:

Slice each hoagie roll lengthwise, being careful not to cut all the way through. You can toast them lightly if you prefer that extra crunch.

Assembling the sandwiches:

Fill each roll generously with the mushroom and pepper mixture. Spoon that luscious cheese sauce over the top, letting it drip down into all the nooks and crannies.

Serving:

Serve immediately while everything is hot and the cheese sauce is at its creamiest. Watch faces light up at the first bite.

Save

These sandwiches became our Friday night tradition during lockdown, something my teenage daughter and I would make together while watching cooking shows. Now whenever she comes home from college, that's the first meal she requests, and we still stand at the stove together, taking turns stirring the cheese sauce and catching up on life.

Make It Your Own

I love adding thinly sliced seitan or marinated tofu to the mushroom mixture when I want extra protein. The seitan especially has this chewy texture that makes it feel even more like the classic version. Just toss it in with the mushrooms during the last few minutes of cooking so it heats through and absorbs all those spices.

The Perfect Sides

These cheesesteaks are practically begging for some crispy oven-baked fries on the side. I cut russet potatoes into wedges, toss them with a little olive oil and salt, and bake at 425°F for 25 minutes while I prepare the sandwiches. A simple green salad with a tangy vinaigrette cuts through the richness beautifully too.

Storage And Reheating

The vegetable mixture keeps beautifully in the refrigerator for up to 4 days. Store it separately from the cheese sauce, which also lasts 4 days in its own container. When you're ready to enjoy leftovers, reheat the filling in a skillet over medium heat and warm the cheese sauce gently, whisking in a splash of milk if it's too thick. Fresh rolls make all the difference, but you can also serve this over rice or stuff it into a wrap for an easy lunch.

• Never refrigerate assembled sandwiches or the rolls will get soggy and sad
• The cheese sauce can be frozen for up to 3 months if you want to meal prep
• Reheat everything uncovered so you don't trap moisture and lose that crispy texture

Save

There's something magical about watching someone take that first bite and do a double take because they can't believe this is entirely plant-based. Good food brings people together, regardless of what's on the plate.

Recipe FAQs

→ Can I substitute the portobello mushrooms with another vegetable?

Yes, you can use cremini or shiitake mushrooms as alternatives. They offer similar texture and umami flavor that complement the dish well.

→ How can I make the cheese sauce thicker?

Whisk the sauce over medium heat a bit longer until it thickens to your desired consistency. Adjusting cornstarch slightly can also help achieve thickness.

→ What breads work best for this sandwich?

Soft hoagie or sub rolls are ideal. You can also use gluten-free bread if needed, ensuring it holds the filling without becoming soggy.

→ Is there a way to add protein to this dish?

Adding thinly sliced seitan or marinated tofu to the vegetable mixture boosts protein content while maintaining the plant-based profile.

→ How can I add a spicy kick to the sandwich?

Include sliced jalapeños or sprinkle chili flakes into the vegetable mix for a subtle heat that enhances the flavors.