Onion Garlic Mashed Potatoes

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Caramelized Onion + Garlic Thyme Mashed Potatoes

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A bowl of creamy onion garlic mashed potatoes topped with melted butter and garnished with herbs. A hand holds a spoon resting in the bowl, placed on a rustic wooden table.

Prep

10 minutes

Cook

20 minutes

Yield

3 -4

Elevate your 🥔 mashed potatoes with sweet caramelized onions, aromatic garlic, and fresh thyme in this completely vegan side dish. Irresistibly creamy and packed with flavor, these onion garlic mashed potatoes will steal the show at any dinner table!

Is there anything better than smooth and creamy mashed potatoes? What about a plant-based vegan Food By Maria version? These onion-garlic mashed potatoes take comfort food to a whole new level with slow-caramelized onions, aromatic garlic, and fresh thyme. They’re so delicious that your family will be begging for the recipe at your next holiday dinner!

❤️ Why You’ll Love This Caramelized Onion + Garlic Thyme Mashed Potatoes

  • Flavor-Packed: Caramelized onions and garlic create depth that regular mashed potatoes can’t match.
  • Plant-Based: Completely vegan but so decadent that nobody will miss the dairy.
    Crowd-pleaser
    : These elevated mashed potatoes will steal the show at any dinner table.
A bowl of creamy mashed potatoes garnished with fresh herbs, placed on a rustic wooden table. A folded white cloth and a tarnished silver spoon lie next to the bowl. The scene has a cozy, warm ambiance.

🍲 Ingredients

Russet Potatoes – These starchy potatoes create the perfect fluffy base for this dish. They’re not just delicious but nutritious too, offering protein, fiber, and essential vitamins and minerals that make this comfort food surprisingly beneficial.


Fresh Thyme – This aromatic herb brings an earthy, slightly lemony flavor that perfectly complements the caramelized onions. Beyond taste, thyme has historical significance – the Greeks believed it inspired courage and used it in baths and as incense. It’s also known for its digestion-aiding properties, especially with fatty foods.

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👩‍🍳 How to Make This Caramelized Onion + Garlic Thyme Mashed Potatoes

  1. Bring a large pot of water to a boil and cook your potatoes until soft and fork-tender.
  2. Into a cast iron skillet add a dash of olive oil and cook your onions, garlic and thyme on low-medium heat till caramelized, fragrant and tender. This may take as long as it takes to cook the potatoes.  Stir often to avoid burning. The slower you cook these the better. Be patient.
  3. Into a high-speed blender add your strained potatoes, onion + garlic mixture and the rest of your ingredients. Using a blender tamper push the ingredients down and blend for around 1 minute or until perfectly smooth. Add more milk, 1 tbsp. at a time if your blender is finding it hard to reach that consistency.
  4. Serve hot with a drizzle of oil and dusting of fresh thyme!
Close-up of creamy Onion Garlic Mashed Potatoes drizzled with olive oil, garnished with fresh thyme leaves.

🗒 Tips and Tricks

  • Caramelization: Cook your onions low and slow for the best sweet, complex flavor – be patient; it’s worth it!
  • Potatoes: Cut potatoes into similar-sized chunks for even cooking and boil until truly fork-tender.
  • Blend: Using a high-speed blender with a tamper creates incredibly smooth potatoes without overworking them.
  • Temperature: Warm your plant milk before adding it to keep everything hot and creamy.

🗒 Substitutions

  • Potato Varieties: Yukon Gold potatoes create a naturally buttery flavor, or try a mix of russet and sweet potatoes for complexity.
  • Herb Options: Rosemary can replace thyme for a different aromatic profile, or try sage for a warming, holiday flavor.
  • Nutritional Yeast: If you don’t have nutritional yeast, a touch of white miso paste can provide similar umami depth.
  • Vegan Butter: Substitute with extra virgin olive oil for a different richness, or try coconut oil for subtle sweetness.

🗒 Best served with

A bowl of creamy mashed potatoes topped with olive oil and garnished with fresh thyme. It is placed on a rustic wooden table with a white cloth underneath.

👝 How to Store Leftovers

Store in an airtight container in the refrigerator for up to 4 days.

🤔 Common Questions

Can I make these Onion Garlic Mashed Potatoes ahead of time?

Yes! Prepare up to 2 days ahead and store in the refrigerator. Reheat in the oven at 350°F in a covered dish with a splash of plant milk until hot throughout.

Why use a blender instead of a potato masher?

A high-speed blender creates incredibly smooth, restaurant-quality mashed potatoes. The tamper helps control the process without overworking the potatoes, which can make them gummy.

Can I make this without a high-speed blender?

Absolutely! Use a potato ricer for ultra-smooth results or a regular masher for a more rustic texture. Just heat your plant milk and mix in all the other ingredients thoroughly.

Why do you use nutritional yeast in this recipe?

Nutritional yeast adds a savory, almost cheesy flavor while boosting protein, B vitamins, and minerals. It’s a pantry staple that gives these vegan mashed potatoes incredible depth.

How can I make these even more decadent?

Add roasted garlic instead of sautéed, increase the amount of vegan butter, or fold in some vegan cream cheese for extra richness.

Close-up of creamy onion garlic mashed potatoes swirled with olive oil and garnished with fresh thyme leaves. The smooth texture and infused flavors paired with the golden oil create a visually appealing dish.

Onion Garlic Mashed Potatoes

5 from 1 vote
Elevate your 🥔 mashed potatoes with sweet caramelized onions, aromatic garlic, and fresh thyme in this completely vegan side dish. Irresistibly creamy and packed with flavor, these onion garlic mashed potatoes will steal the show at any dinner table!
Prep Time 10 minutes
Cook Time 20 minutes
Course Sides
Cuisine Vegan
Servings 3 -4

Ingredients
  

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Instructions
 

  • Bring a large pot of water to a boil and cook your potatoes until soft and fork-tender.
  • Into a cast iron skillet add a dash of olive oil and cook your onions, garlic and thyme on low-medium heat till caramelized, fragrant and tender.  This may take as long as it takes to cook the potatoes.  Stir often to avoid burning.  The slower you cook these the better. Be patient.
  • Into a high-speed blender add your strained potatoes, onion + garlic mixture and the rest of your ingredients.  Using a blender tamper push the ingredients down and blend for around 1 minute or until perfectly smooth.  Add more milk, 1 tbsp. at a time if your blender is finding it hard to reach that consistency.
  • Serve hot with a drizzle of oil and dusting of fresh thyme!
Review This Recipe Let us know how it was!

Disclaimer: This post was sponsored by Bob’s Red Mill

Brittany R

This recipe made the creamiest mashed potatoes ever. So delicious. I followed the recipe with the exception of the splash of lemon because I didn’t have any. The fresh thyme really adds a nice fragrant flavor to the dish. Thanks for a great recipe, once again. 🙂

Maria Koutsogiannis

Right, aren’t they amazing!!!! So glad you loved them babes!

Jess @choosingchia

5 stars
My new favourite dip! So good!!

Maria Koutsogiannis

Thank you Jess! They’re really smooth and creamy and rich. Just how I love them!

5 from 1 vote

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