French Onion Smashed Potatoes: Crispy, Savory, and Full of Flavor

Introduction

The French Onion Smashed Potatoes take the classic smashed potato recipe to the next level by infusing it with the rich, savory flavor of French onion soup. Caramelized onions, garlic, and melted cheese transform simple potatoes into a decadent, restaurant-worthy side dish. Crispy on the outside and soft on the inside, these potatoes are perfect for weeknight dinners, brunches, or special occasions.

This recipe is written to be easy to follow, with step-by-step instructions that even beginner cooks can achieve. The combination of crispy smashed potatoes and French onion flavors delivers a comforting, aromatic, and visually stunning dish.

Whether paired with roasted meats, grilled vegetables, or served on their own as a snack, French Onion Smashed Potatoes are guaranteed to impress and satisfy.

Why This Recipe Is Special

The dish is special because it marries the crispy, golden texture of smashed potatoes with the deep, savory flavor of caramelized onions, garlic, and melted cheese. Unlike a traditional side, this recipe adds layers of flavor and aroma, making it a standout at any meal.

It’s also versatile: you can control the amount of cheese, herbs, and seasoning to suit your taste. Quick to prepare and easy to customize, this recipe transforms simple potatoes into a gourmet dish.

Why You’ll Love This Recipe

Crispy on the outside, soft inside
Rich, savory French onion flavor
Quick and easy to prepare
Customizable with cheese, herbs, and seasoning
Perfect for dinners, parties, or brunch

Ingredients and Tools

Ingredients

1.5 lbs (700 g) small potatoes, such as baby or new potatoes
2 tbsp olive oil
2 tbsp unsalted butter
1 large onion, thinly sliced
½ tsp salt
½ tsp freshly ground black pepper
2 cloves garlic, minced
½ tsp dried thyme or 1 tsp fresh thyme leaves
½ cup (50 g) shredded Gruyère, Swiss, or mozzarella cheese
Optional: fresh parsley for garnish

Tools You Will Need

Large pot for boiling
Baking sheet
Parchment paper or silicone mat (optional)
Potato masher, fork, or bottom of a glass
Skillet for caramelizing onions
Spatula or tongs

Pro Ingredient Notes

Baby potatoes work best for uniform cooking and smashing.
Use a cheese that melts well for a gooey, golden topping.
Fresh thyme or parsley adds aroma and enhances presentation.

Step-by-Step Instructions

Step 1: Boil the Potatoes

Place potatoes in a large pot, cover with salted water, and bring to a boil. Cook for 10–12 minutes, until tender but not falling apart. Drain and let dry slightly.

Tip: Slightly drying the potatoes ensures they crisp up in the oven.

Step 2: Preheat Oven

Preheat oven to 450°F (230°C). Line a baking sheet with parchment paper or lightly grease with olive oil.

Step 3: Caramelize the Onions

In a skillet over medium heat, melt butter. Add sliced onions and cook, stirring occasionally, until golden brown and caramelized (about 10–12 minutes). Add garlic in the last minute of cooking. Season with salt, pepper, and thyme.

Step 4: Smash the Potatoes

Place boiled potatoes on the baking sheet. Using a potato masher, fork, or bottom of a glass, gently press down until each potato is about ½ inch thick.

Visual cue: Flatten without breaking apart completely to create a larger surface area for crisping.

Step 5: Add Onions and Oil

Drizzle olive oil over the smashed potatoes. Top each potato with a spoonful of caramelized onions and a pinch of cheese.

Step 6: Roast Until Golden and Crispy

Roast in the preheated oven for 12–15 minutes, until the edges are golden and crispy, and the cheese is melted.

Tip: Flip the potatoes halfway through for extra crispiness and even browning.

Step 7: Serve Hot

Remove from the oven and transfer to a serving dish. Garnish with fresh parsley if desired. Serve immediately for maximum crispiness and flavor.

Serving Idea: Pair with roasted chicken, steak, or grilled vegetables. They also make a delicious appetizer with a dipping sauce like sour cream or garlic aioli.

Tips for Best Results

Use small, evenly sized potatoes for uniform cooking.
Dry potatoes after boiling to ensure crisp edges.
Caramelize onions slowly for a rich, sweet flavor without burning.
Roast at high heat to achieve a golden, crispy exterior.
Use cheese that melts well for a gooey, indulgent topping.

Common Mistakes and How to Fix Them

Potatoes not crispy: Ensure the oven is preheated and potatoes are not overcrowded.
Onions not flavorful: Cook slowly over medium heat to develop sweetness and depth.
Potatoes falling apart: Do not overboil; they should be tender yet firm.
Uneven cheese melt: Sprinkle cheese evenly over each potato for consistent melting.

Easy Variations and Customizations

Gruyère and Thyme Smashed Potatoes

Use Gruyère cheese and fresh thyme for a rich, aromatic French onion twist.

Cheddar and Caramelized Onion

Swap Gruyère for sharp cheddar for a bolder flavor.

Herb Garlic French Onion

Add garlic powder and fresh herbs like rosemary or parsley for extra depth.

Spicy French Onion Smashed Potatoes

Add a pinch of smoked paprika or chili flakes to the onions for a subtle kick.

Vegan Option

Use olive oil instead of butter and vegan cheese or nutritional yeast for a plant-based version.

Serving and Presentation Ideas

Serve as a side for roasted meats, grilled fish, or vegetable dishes. Arrange on a platter and garnish with fresh herbs. For parties, pair with dipping sauces like garlic aioli or sour cream. The golden, crispy edges and melted cheese create a visually appealing dish that will impress guests.

Make-Ahead and Storage Tips

Prepare potatoes and caramelize onions in advance. Refrigerate for up to 24 hours, then roast just before serving to maintain crispiness. Avoid microwaving, which can make potatoes soft.

Frequently Asked Questions

Can I use larger potatoes?

Yes, but adjust boiling and smashing time. Smaller potatoes yield the best crispiness.

Can I make this vegan?

Yes, use plant-based butter or olive oil and vegan cheese or nutritional yeast.

Can I prepare ahead for a party?

Yes, boil potatoes and caramelize onions in advance, then roast before serving.

Can I freeze these potatoes?

Partially cooked potatoes can be frozen. Reheat in a hot oven; texture may be slightly softer than freshly roasted.

Conclusion

French Onion Smashed Potatoes are a savory, flavorful, and visually stunning side dish that combines crispy potatoes, caramelized onions, and melted cheese. Easy to prepare yet impressive in flavor, they are perfect for dinners, brunch, or entertaining guests.

With detailed instructions, tips, and variations, this recipe ensures golden, crispy, and flavorful smashed potatoes every time. They are guaranteed to become a favorite in your recipe repertoire.

Crispy French Onion Smashed Potatoes