Skip to main content

Mushroom Kasha Burgers with Chipotle Mayonnaise

These mushroom and kasha burgers offer a sophisticated twist on the classic vegetarian burger, using roasted buckwheat groats for a nutty, toasted flavour and a wonderful texture. The earthiness of the portobello mushrooms is perfectly balanced by the sweet red peppers and a splash of savoury soy sauce, creating a substantial patty that holds its own against the bold toppings. Coated in crisp breadcrumbs and fried until golden, they provide a satisfying crunch in every bite.

Served on toasted rye bread with a creamy, spicy chipotle mayonnaise, this vegetarian dish is an excellent choice for a weekend lunch or a midweek treat. The patties benefit from a short rest in the fridge, making them an ideal make-ahead option for busy cooks. For a lighter meal, these burgers are equally delicious served alongside a crisp green salad or some oven-roasted potato wedges.

Continue reading below

Ingredients for Mushroom Kasha Burgers with Chipotle Mayonnaise

  • 160ml water

  • 80ml coarse kasha (whole roasted buckwheat groats)

  • 450g portabella mushrooms, stems discarded

  • 160g finely chopped onion

  • 160g finely chopped red pepper

  • 3 tablespoons unsalted butter

  • 2 garlic cloves, finely chopped

  • 3 tablespoons finely chopped flat-leaf parsley

  • 1 teaspoon soy sauce

  • 350ml fine dry bread crumbs, divided

  • 1 large egg, lightly beaten

  • 60ml olive oil

  • 120ml mayonnaise

  • 1 tablespoon Tabasco chipotle sauce, or to taste

  • 8 large oval slices rye bread, cut into 4 1/2-inch rounds if desired, lightly toasted

How to make Mushroom Kasha Burgers with Chipotle Mayonnaise

Bring water to a boil in a 1- to 1 1/2-quart heavy saucepan, then stir in kasha. Cover and reduce heat to low, then cook until kasha is tender and water is absorbed, about 10 minutes. Transfer to a bowl and cool.

Break one third of mushrooms into a food processor and pulse until finely chopped, then transfer to a bowl. Repeat with remaining 2 batches of mushrooms, transferring to bowl.

Cook onion and pepper in butter in a 12-inch heavy skillet over medium heat, stirring occasionally, until softened, about 5 minutes. Add chopped mushrooms, garlic, 3/4 teaspoons salt, and 1/2 teaspoons pepper and cook over medium-high heat, stirring occasionally, until any liquid mushrooms give off is evaporated and mushrooms begin to brown, 8 to 10 minutes. Transfer mixture to a large bowl, then stir in kasha, parsley, soy sauce, and 120ml bread crumbs until combined well. Cool 10 minutes, then stir in egg until combined well.

Line a platter with foil. Spread remaining cup bread crumbs in a shallow baking dish.

Form one fourth of mushroom mixture (about 180ml ) into a 3/4-inch-thick patty (3 1/2 inches in diameter), then dredge in bread crumbs, knocking off excess, and transfer to platter. Form and dredge 3 more patties, transferring to platter. Chill patties, loosely covered with plastic wrap, 1 hour.

Heat oil in cleaned 12-inch heavy skillet over medium-high heat until it shimmers, then fry patties, turning over once, until deep golden, about 4 minutes total. Transfer patties to paper towels to drain (patties will be soft).

Meanwhile, whisk together mayonnaise and chipotle sauce.

Spread bread with chipotle mayonnaise and sandwich each mushroom patty between 2 slices.

Disclaimer

While every effort has been made to ensure the information is accurate and up to date, individual needs may vary and dietary requirements can differ based on personal health conditions. Always check food labels and allergen information before preparing or consuming any recipe. If you have specific health concerns, allergies, intolerances, or are following a medically prescribed diet, seek advice from your GP, pharmacist, or a registered dietitian before making significant changes to your diet or lifestyle.

Article history

The information on this page is peer reviewed by qualified clinicians.

  • 17 Jan 2026 | Originally published

    Authored by:

    UK recipe editors

    Peer reviewed by

    UK recipe editors
flu eligibility checker

Ask, share, connect.

Browse discussions, ask questions, and share experiences across hundreds of health topics.

symptom checker

Feeling unwell?

Assess your symptoms online for free

Sign up to the Patient newsletter

Your weekly dose of clear, trustworthy health advice - written to help you feel informed, confident and in control.

Please enter a valid email address

By subscribing you accept our Privacy Policy. You can unsubscribe at any time. We never sell your data.