Garlic Mashed Potatoes Onion Crumble

Featured in: Cozy Baked Comforts

This dish combines smooth, buttery mashed potatoes with the rich flavor of roasted garlic. The highlight is a crispy fried onion crumble made by soaking onions in buttermilk, coating them in seasoned flour, and frying until golden. The combination creates a satisfying contrast of creamy and crunchy textures, perfect for pairing with meats or enjoying as a hearty side. Simple to prepare, it takes under an hour and serves six.

Updated on Mon, 24 Nov 2025 08:05:00 GMT
Fluffy Garlic Mashed Potatoes topped with golden, crispy fried onion crumble, ready to serve and enjoy. Pin This
Fluffy Garlic Mashed Potatoes topped with golden, crispy fried onion crumble, ready to serve and enjoy. | duneoven.com

Creamy, buttery mashed potatoes infused with roasted garlic and topped with a golden, crispy fried onion crumble for a decadent and comforting side dish.

This recipe has been a family favorite for years and always receives compliments at holiday dinners.

Ingredients

  • Potatoes & Garlic: 1.5 kg (3.3 lbs) Yukon Gold or Russet potatoes peeled and cut into chunks, 1 head garlic cloves separated but unpeeled, 1 tsp olive oil, 120 ml (1/2 cup) whole milk warmed, 60 g (1/4 cup) unsalted butter at room temperature, 1 tsp salt plus more to taste, 1/2 tsp freshly ground black pepper
  • Crispy Fried Onion Crumble: 1 large yellow onion thinly sliced, 60 ml (1/4 cup) buttermilk (or milk with 1 tsp lemon juice), 50 g (1/3 cup) all-purpose flour (or gluten-free flour blend), 1/2 tsp paprika, 1/4 tsp salt, 1/4 tsp ground black pepper, vegetable oil for frying
  • Garnish: 2 tbsp chopped fresh chives or parsley (optional)

Instructions

Roast Garlic:
Preheat oven to 200°C (400°F). Place garlic cloves on a small piece of foil, drizzle with olive oil, wrap, and roast for 20–25 minutes until tender. Cool then squeeze out roasted garlic from skins.
Cook Potatoes:
While garlic roasts place potatoes in a large pot cover with cold water and add 1 tsp salt. Bring to a boil. Reduce heat and simmer for 15–20 minutes until potatoes are fork-tender. Drain well.
Mash Potatoes:
In a large bowl mash hot potatoes with roasted garlic butter and warmed milk until smooth and creamy. Season with salt and black pepper to taste. Cover and keep warm.
Make Onion Crumble:
Soak sliced onions in buttermilk for 10 minutes. In a bowl combine flour paprika 1/4 tsp salt and 1/4 tsp pepper. Heat 1–2 cm (1/2–3/4 inch) vegetable oil in a skillet over medium-high heat. Dredge onions in flour mixture and fry in batches until golden and crisp 2–3 minutes per batch. Drain on paper towels.
Assemble:
Spoon mashed potatoes into a serving bowl. Top generously with crispy fried onion crumble. Sprinkle with chives or parsley if desired.
Pin This
| duneoven.com

We love sharing this dish at family gatherings making everyone feel warm and satisfied.

Notes

For extra flavor substitute half the milk with sour cream or cream cheese. Try adding grated Parmesan to the potatoes for a cheesy twist. Make ahead keep mashed potatoes warm in a slow cooker set to low. Pairs well with roast meats or as part of a vegetarian holiday spread.

Required Tools

Large pot potato masher or ricer baking tray and foil mixing bowls skillet slotted spoon paper towels

Allergen Information

Contains dairy (milk butter buttermilk). Contains gluten if using all-purpose flour for onions. If gluten-free is required use a gluten-free flour blend for the onion crumble. Always check ingredient labels for potential allergens.

A bowl of creamy Garlic Mashed Potatoes with a crunchy fried onion topping, a savory comfort food favorite. Pin This
A bowl of creamy Garlic Mashed Potatoes with a crunchy fried onion topping, a savory comfort food favorite. | duneoven.com

This comforting side dish is a guaranteed crowd-pleaser perfect for any occasion.

Recipe FAQ

What type of potatoes work best?

Yukon Gold or Russet potatoes are ideal for achieving a creamy, fluffy texture.

How is the garlic prepared?

Garlic heads are roasted in foil with olive oil until tender, then squeezed out for blending into the potatoes.

Can the onion crumble be made gluten-free?

Yes, by substituting all-purpose flour with a gluten-free flour blend for coating the onions.

How do you achieve a crispy onion crumble?

Soak onions in buttermilk, dredge in seasoned flour, then fry in hot oil until golden and crunchy.

What are good serving suggestions?

This side pairs wonderfully with roast meats or can complement vegetarian holiday meals.

How can I add extra flavor to the potatoes?

Try mixing in sour cream, cream cheese, or grated Parmesan for a richer taste.

Garlic Mashed Potatoes Onion Crumble

Creamy garlic mashed potatoes topped with crispy fried onion crumble for a flavorful, comforting side.

Prep Time
20 minutes
Cook Time
35 minutes
Total Duration
55 minutes
Published by Dune Oven Sara Whitfield

Recipe Category Cozy Baked Comforts

Skill Level Easy

Cuisine Type American

Servings Made 6 Portions

Dietary Details Vegetarian-Friendly

What You Need

Potatoes & Garlic

01 3.3 pounds Yukon Gold or Russet potatoes, peeled and cut into chunks
02 1 head garlic, cloves separated but unpeeled
03 1 teaspoon olive oil
04 1/2 cup whole milk, warmed
05 1/4 cup unsalted butter, at room temperature
06 1 teaspoon salt, plus more to taste
07 1/2 teaspoon freshly ground black pepper

Crispy Fried Onion Crumble

01 1 large yellow onion, thinly sliced
02 1/4 cup buttermilk or milk with 1 teaspoon lemon juice
03 1/3 cup all-purpose flour or gluten-free flour blend
04 1/2 teaspoon paprika
05 1/4 teaspoon salt
06 1/4 teaspoon ground black pepper
07 Vegetable oil, for frying

Garnish

01 2 tablespoons chopped fresh chives or parsley (optional)

How To Make It

Step 01

Roast Garlic: Preheat oven to 400°F. Place garlic cloves on foil, drizzle with olive oil, wrap tightly, and roast for 20 to 25 minutes until tender. Let cool, then squeeze roasted garlic from skins.

Step 02

Cook Potatoes: While garlic roasts, place potatoes in a large pot, cover with cold water, and add 1 teaspoon salt. Bring to a boil, reduce heat, and simmer for 15 to 20 minutes until tender. Drain thoroughly.

Step 03

Mash Potatoes: In a large bowl, mash hot potatoes with roasted garlic, butter, and warmed milk until creamy and smooth. Season with salt and black pepper to taste. Cover and keep warm.

Step 04

Prepare Onion Crumble: Soak sliced onions in buttermilk for 10 minutes. Combine flour, paprika, 1/4 teaspoon salt, and 1/4 teaspoon pepper in a bowl. Heat 1/2 to 3/4 inch vegetable oil in a skillet over medium-high heat. Dredge onions in flour mixture and fry in batches until crisp and golden, about 2 to 3 minutes per batch. Drain on paper towels.

Step 05

Assemble Dish: Spoon mashed potatoes into a serving bowl. Top generously with crispy fried onion crumble. Sprinkle with chopped chives or parsley if desired.

Things You'll Need

  • Large pot
  • Potato masher or ricer
  • Baking tray and foil
  • Mixing bowls
  • Skillet
  • Slotted spoon
  • Paper towels

Allergens

Review every ingredient for allergens and speak with a healthcare provider when unsure.
  • Contains dairy (milk, butter, buttermilk).
  • Contains gluten unless gluten-free flour is used in onion crumble.

Nutrition Details (per serving)

Nutrition is for your information and isn’t meant as medical advice.
  • Calories: 320
  • Fats: 13 g
  • Carbohydrates: 47 g
  • Proteins: 5 g