Vegetarian Irish Stew with Lentils and Mushrooms

When you want comfort food that satisfies, this Vegetarian Irish Stew delivers. It's warm, hearty, deeply savory, and built around humble ingredients like lentils, mushrooms, and root vegetables that simmer into something far greater than the sum of its parts.

This is the kind of cozy, grounding meal I love to come back to again and again. It's nourishing, flexible, and deeply comforting without needing meat to feel complete. Whether you make it for a St. Patrick's Day dinner or a quiet weeknight at home, this stew offers both flavor and staying power. This is comfort food that supports nourishment and satisfaction, not food rules.

Inspired by traditional Irish comfort food and reimagined with plant-based ingredients, this version keeps the rustic feel while layering in richness from mushrooms, lentils, and an optional splash of dark stout. It's beginner-friendly, forgiving, and even better the next day, which makes it great for meal prep or make-ahead dinners.

Pairing this with bread or serving it over mashed potatoes is one easy way to make this meal more satisfying and grounding.

Ingredients

This stew is built around simple, accessible ingredients that come together to create a deeply satisfying, balanced meal. Meals that include protein, fiber-rich carbs, and fats tend to be more sustaining and satisfying. This stew naturally brings all of those together.

• Lentils & Mushrooms: Plant-based protein and savory depth
• Carrots, Potatoes & Onions: Classic stew veggies for substance and sweetness
• Tomato Paste & Roux: Build rich texture and flavor foundation
• Irish Stout (or broth): Adds color, complexity, and a cozy richness
• Dried Thyme, Garlic, Salt & Pepper: Simple aromatics that balance the flavors

The result is a flavorful, cozy stew that feels both nourishing and luxurious.

Instructions

Cook the vegetables in oil, stir in flour and seasoning, and then pour in the stout and deglaze the pot.

Add lentils, potatoes, and broth.

Bring to a boil and then reduce the heat to low and simmer until the lentils and vegetables are tender and the liquid is reduced.

Hint: Adding liquid, such as beer, to the hot pot releases all of the cooked bits that are stuck to the bottom. Those browned bits = flavor. Deglazing lifts them into the stew and makes everything taste richer. Learn more about deglazing in this article from Bon Appétit.

Substitutions

A few suggestions for ingredient swaps:

• Gluten free: Use gluten-free stout (or water or broth) and gluten-free flour.
• Without beer: Substitute water or vegetable broth for the stout. You can also use N/A (non-alcoholic) beer if preferred.

Variations

Make it your own:

• Root vegetable: Include a combination of potatoes, carrots, parsnips, and turnips for added variety.
• Beef-less Stew: Use plant-based steak "meat" instead of mushrooms. Look for it in the frozen section.

See this vegetarian pot pie for another plant-based comfort food idea!

Holiday Pairings

St. Patrick's Day: If you want to make a full St. Patrick's day feast, try this with my Tempeh Shepherd's Pie, Vegan Potato Leek Soup, and Roasted Cabbage Caesar Salad. Or if you're looking for something green, make this Quick Pasta with Spinach Sauce.

Thanksgiving or Christmas: I also love this recipe as a grounding vegetarian main dish for the holiday season, freeing you up from needing a "special" main dish for plant-based eaters in a mixed crowd. If you're looking for more plant-based recipes to add to your holiday menu, try my Vegetarian Herb Stuffing with Brown Butter and Walnuts, Vegan Sweet Potato Casserole, or Creamy Vegan Mushroom Gravy with Rosemary and Thyme.

Equipment

• Knife and cutting board: for chopping vegetables.
• Large pot: to cook the stew. A large Dutch oven works, too.
• Wooden spoon: for stirring and deglazing the pot. A wooden spoon or spatula works best, but you can also use a silicone or plastic spoon/spatula if needed. Avoid metal utensils, as they can scratch the pot.

Storage

This recipe is make ahead-friendly. Store the prepared stew in an airtight container in the refrigerator up to five days.

To freeze, transfer the stew to a freezer bag and store in the freezer for up to three months. Thaw overnight in the fridge.

Reheating

Microwave the stew in 30 second increments until warm, stirring in between.

You can also warm up the stew in a pot over medium heat on the stovetop until warm.

This stew tends to thicken while in storage. Stir in additional water or vegetable broth to thin it out to the consistency you like.

FAQ

Pairing

These are my favorite vegetarian dishes to serve with Irish stew:

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📖 Recipe

Vegetarian Irish Stew with Lentils and Mushrooms

Stephanie McKercher, RDN

This vegetarian Irish stew is like a cozy hug. It's made with lentils, mushrooms, root veggies, and (optional) Irish stout beer. Naturally vegan and packed with 20 g of plant protein per serving, it's easy to prep ahead and slow-simmer to perfection. Great for chilly evenings or a festive St. Patrick's Day dinner!

4.2 from 21 votes

Print Recipe Save Recipe Saved! Pin Recipe

Prep Time 10 minutes mins

Cook Time 1 hour hr

Total Time 1 hour hr 10 minutes mins

Course Main Course, Soup

Cuisine dairy-free, Holiday, Irish, St. Patrick's Day, vegan, vegetarian

Servings 4 people

Calories 464 kcal

Equipment

• Knife and cutting board
• Large pot

Ingredients

  

1x2x3x

• 2 tablespoons olive oil
• 3 large carrots halved lengthwise and then cut into 1-inch pieces
• 1 medium yellow onion diced
• 8 ounces white mushrooms quartered
• 3 cloves garlic minced
• ¼ cup tomato paste
• ¼ cup flour
• 2 teaspoons dried thyme
• 1 teaspoon salt or to taste
• ¼ teaspoon cracked black pepper or to taste
• 1 (11.7-14.9-ounce) bottle or can Irish stout beer (such as Guinness, see note 1)
• 4 medium gold potatoes chopped into 1-inch pieces (about 4 cups)
• 1 cup dry lentils
• 4 cups vegetable broth

Optional for serving:

• 2 tablespoons chopped fresh parsley
• Fresh bread toasted if desired

Instructions

 

• Pour oil into a large pot over medium-high heat. Once hot, stir in carrot and onion and cook 6 mins, stirring occasionally with a wooden spoon, or until onion is translucent. Stir in mushrooms, garlic, and tomato paste, and cook 4 minutes, or until mushrooms darken. Stir in flour until vegetables are evenly coated. Stir in thyme, salt, and pepper until evenly mixed.
• Pour in the stout and scrape any bits stuck to the bottom of the pot with your wooden spoon.
• Add potatoes, lentils, and broth. Bring to a boil over high heat, and then reduce heat to low and simmer uncovered 45 minutes, stirring occasionally, or until lentils and vegetables are tender and the liquid is reduced and thickened. Scrape the bottom of the pot with your wooden spoon as needed for sticking. If there is not enough stew liquid, gradually stir in more water or vegetable broth until desired consistency is reached. If you add too much liquid, continue cooking uncovered until reduced. Taste and adjust seasoning if desired.
• Garnish with chopped parsley and serve with bread if desired.

Notes

1. Beer: I tested this recipe with both a (11.7-ounce) bottle and (14.9-ounce) can of Guinness. Use either size or another type of stout beer if desired. To make this recipe without beer, substitute 1 ½ cups water or vegetable broth for the stout. You can also substitute N/A beer if desired.
2. Gluten free: Use gluten-free stout (or water or broth) and gluten-free flour.
3. Storage: Store in an airtight container in the refrigerator up to five days.
4. Freezing: Store in a freezer bag in the freezer up to 3 months. Thaw overnight in the fridge.
5. Reheating: Microwave in 30 second increments until warm, stirring in between. You can also warm up the stew in a pot over medium heat on the stovetop, adding more water or broth as needed, until warm. Stir in additional water or vegetable broth if the stew is too thick.
6. Nutrition facts are estimates only and do not include optional ingredients for serving.

Serving Suggestions:

• Tempeh Shepherd's Pie
• Vegan Potato Leek Soup
• Roasted Cabbage Caesar Salad
• Vegetarian Herb Stuffing with Brown Butter and Walnuts
• Vegan Sweet Potato Casserole
• Creamy Vegan Mushroom Gravy with Rosemary and Thyme

Nutrition

Serving: 0.25recipe | Calories: 464kcal | Carbohydrates: 81g | Protein: 20g | Fat: 8g | Saturated Fat: 1g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 5g | Sodium: 1701mg | Potassium: 1741mg | Fiber: 22g | Sugar: 11g | Vitamin A: 8604IU | Vitamin C: 49mg | Calcium: 95mg | Iron: 7mg

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