Veggie Sliders with Caramelized Mushrooms

Name: Veggie Sliders with Caramelized Mushrooms
Prep time: 15 min
Cook time: 20 min
Total time: 35 min
Yield: 4 servings
Ingredients: 1 can (15 oz) black beans, rinsed and drained; 1 cup cooked quinoa; 1/2 cup breadcrumbs; 1/4 cup finely chopped onions; 1 clove garlic, minced; 1 teaspoon cumin; Salt and pepper to taste; 4 slider buns; Lettuce and tomato for topping; 2 cups sliced mushrooms; 1 tablespoon olive oil; 1 tablespoon butter; 1 tablespoon soy sauce; 1 teaspoon sugar

Highlighted under: Natural Healthy Meals Collection

I absolutely love making veggie sliders, especially when I can top them with nicely caramelized mushrooms. The combination creates an explosion of flavor that satisfies anyone’s cravings for a hearty burger, without the meat. I often prepare these sliders for gatherings, and they never fail to impress my friends. The mushrooms add a rich umami taste that complements the veggies perfectly, making each bite a delicious experience. Plus, these sliders are easy to whip up in no time!

Created by

Elspeth Murray

Last updated on 2026-01-13T00:53:35.036Z

When creating these sliders, I wanted to strike the right balance between healthy ingredients and flavors that everyone would enjoy. After experimenting with different combinations, I found that the sweetness of caramelized onions and mushrooms worked wonders together, elevating what could be an ordinary veggie burger into something extraordinary. This dish has quickly become a favorite in my household.

One tip that I’ve learned along the way is to allow the mushrooms to cook slowly. It takes time, but the reward is a deep, rich flavor that truly makes these sliders stand out. I recommend not rushing this step—you’ll be amazed at how a little patience transforms your mushrooms!

Why You Will Love These Sliders
Juicy and flavorful thanks to caramelized mushrooms
Packed with nutritious veggies for a guilt-free treat
Perfect for meal prep or casual gatherings

The Magic of Caramelization

Caramelizing mushrooms is a key technique in this recipe that brings out their natural sweetness and umami depth. By cooking them over medium heat with a mix of olive oil and butter, you allow the moisture to evaporate slowly, leading to beautifully golden-brown results. Stirring occasionally will help ensure even cooking and prevent burning. When they're ready, the mushrooms should be glossy and significantly reduced in volume, adding a rich layer of flavor to the sliders.

The addition of soy sauce and sugar during the last stages of cooking further enhances the caramelization process. The sugar helps to create that irresistible crust while the soy sauce infuses a savory element that makes each bite pop. If you find your mushrooms release too much liquid, try increasing the heat slightly; this will encourage evaporation and allow for a beautifully caramelized finish.

Crafting the Perfect Veggie Patty

The foundation of these sliders lies in the black bean and quinoa patties, which not only provide protein but also offer a satisfying texture. To ensure the patties hold together, it's crucial to mash the black beans until they are mostly smooth, leaving just a few chunks for texture. This creates a cohesive mixture when combined with the cooked quinoa and breadcrumbs, which serve as binding agents. If the mixture feels too wet, adding more breadcrumbs can help achieve the right consistency.

Seasoning the patties is key; don’t skimp on the cumin, as it adds a warm, earthy note that beautifully complements the mushrooms. Taste the mixture before forming patties to adjust the seasoning; a pinch of salt or pepper can make a remarkable difference. When frying, a preheated non-stick skillet is essential to develop a nice crust; allow the patties to cook undisturbed for the recommended time before flipping to achieve optimal browning.

Ingredients

Ingredients for Veggie Sliders

For the Sliders

1 can (15 oz) black beans, rinsed and drained
1 cup cooked quinoa
1/2 cup breadcrumbs
1/4 cup finely chopped onions
1 clove garlic, minced
1 teaspoon cumin
Salt and pepper to taste
4 slider buns
Lettuce and tomato for topping

For the Caramelized Mushrooms

2 cups sliced mushrooms
1 tablespoon olive oil
1 tablespoon butter
1 tablespoon soy sauce
1 teaspoon sugar

Instructions

Prepare the Mushroom Topping

In a skillet over medium heat, add olive oil and butter. Once melted, add sliced mushrooms and cook slowly for about 10 minutes until they are golden brown and caramelized. Stir in soy sauce and sugar, cooking for an additional 2 minutes.

Make the Veggie Patties

In a large bowl, mash black beans with a fork until mostly smooth. Stir in cooked quinoa, breadcrumbs, onions, garlic, cumin, salt, and pepper until well combined. Form the mixture into 4 patties.

Cook the Sliders

In a non-stick skillet, cook the patties over medium heat for about 4-5 minutes on each side, or until golden brown and heated through.

Assemble the Sliders

Place a veggie patty on each slider bun, top with the caramelized mushrooms, and add lettuce and tomato as desired. Serve warm.

Pro Tips

For an extra layer of flavor, feel free to add your favorite sauces or condiments to the sliders. Spicy mayo or a drizzle of balsamic glaze would be fantastic!

Storage and Make-Ahead Tips

These veggie sliders are perfect for meal prep, as both the patties and caramelized mushrooms can be made ahead of time. Store the patties in an airtight container in the refrigerator for up to three days, or freeze them for longer storage. When freezing, separate layers with parchment paper to prevent sticking. To reheat, simply thaw in the fridge overnight and pan-fry until heated through and crispy.

The caramelized mushrooms can also be prepared in advance and stored in the refrigerator for up to four days. When ready to serve, just gently reheat them in a skillet over low heat to maintain their texture and flavor, adding a splash of water if they seem dry. With everything prepped, assembling the sliders takes mere minutes, making this a fantastic last-minute meal option.

Serving Suggestions and Variations

These sliders can be customized countless ways. Try adding a slice of cheese, like pepper jack or goat cheese, for an extra layer of flavor. For those who prefer a bit of heat, jalapeños or a spicy aioli can amp up the spice level and add a tasty kick. Alternatively, swap out the buns for lettuce wraps for a low-carb option that allows the flavors to shine through without the extra calories.

Pair your sliders with a side of sweet potato fries or a fresh salad to round out the meal. They also make a great addition to a backyard barbecue spread or a fun game day snack. If you’re feeling adventurous, consider a theme night by serving these sliders alongside different global toppings such as tzatziki, salsa, or pickled vegetables to create a unique flavor experience with every bite.

Questions About Recipes

→ Can I make these sliders gluten-free?

Absolutely! Just use gluten-free breadcrumbs and buns.

→ How long can I store leftover sliders?

Leftover sliders can be refrigerated for up to 3 days. Just reheat before serving.

→ What type of mushrooms work best?

I recommend using cremini or button mushrooms for a great flavor, but feel free to experiment with others!

→ Can I freeze the sliders?

Yes, you can freeze the uncooked patties. Just shape them and place them on a baking sheet to freeze, then store in an airtight container.