French Onion Soup Mac & Cheese 🧀🔥

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A classic mac & cheese meets rich, caramelized French onion soup—this is the ultimate comfort food!

🍽 Ingredients

Onions:

• 3 white onions, julienned (Slice effortlessly with this top-rated mandoline)
• 65g unsalted butter
• Pinch of salt
• 1 tbsp thyme, finely chopped
• 300ml beef stock

Breadcrumbs:

• 1 small baguette (Get perfect, even slices with this serrated bread knife)
• 1 tbsp finely chopped thyme
• 3 tbsp olive oil 
• Pinch of salt

Mac & Cheese Base:

• 110g unsalted butter
• 110g all-purpose flour (Make measuring easy with this digital kitchen scale)
• 1.1L whole milk 
• 100g Gruyère cheese (Shred it like a pro using this stainless steel cheese grater)
• 100g mozzarella cheese, grated
• 1 tsp Dijon mustard
• 5 gratings nutmeg
• Salt & pepper
• 500g spirali (cavatappi) pasta (Cook it perfectly in this large non-stick pot)

🔥 Step-by-Step Instructions

1️⃣ Caramelizing the Onions

• In a heavy-bottom pan, add onions, butter & a pinch of salt.
• Cook over medium heat for 30-40 minutes until dark, golden & caramelized.
• Add stock & thyme, turn heat to medium-high, and cook for 10 more minutes until most of the stock is absorbed. Set aside.

2️⃣ Making the Breadcrumbs

• Slice the baguette into discs with a bread knife.
• Toss with olive oil, thyme & salt in a bowl.
• Lay out on a baking sheet and bake at 350°F (175°C) for 5-10 minutes until golden.
• Blend into coarse breadcrumbs using a powerful food processor.

3️⃣ Preparing the Cheese Sauce

• In a saucepan, melt butter over medium heat, then mix in flour. Cook for a few minutes.
• Gradually whisk in milk to avoid lumps, stirring constantly.
• Let it bubble for a few minutes, then remove from heat.
• Add 2/3rds of the caramelized onions, cheeses, mustard, nutmeg, salt & pepper.

4️⃣ Cooking the Pasta

• Bring a large pot of water to a boil, season with salt, and cook pasta for 8-10 minutes until al dente.
• Reserve some pasta water, then drain.

5️⃣ Bringing It All Together

• Add pasta back to the pan, pour over the cheese sauce, and mix.
• If too thick, add a splash of pasta water to loosen.
• Smooth it out, top with breadcrumbs & remaining onions.
• Place under a broiler/grill for 5 minutes until golden & crispy.

🔥 Serve hot & enjoy the best mac & cheese ever! 😍