Data-Driven Mac and Cheese

Bring a large pot of water (minimum 3L) to a rolling boil. Add 2 tbsp salt — this mimics the 1% salinity standard for optimally seasoned pasta. Record start time.

Add 400g macaroni. Stir immediately to prevent sticking. Cook until al dente per package instructions (typically 8-10 minutes). Take sample at 8 minutes to test texture — drain 1 piece and bite it.

Drain pasta, reserving 240ml (1 cup) of pasta water. This starch-laden liquid is your insurance policy for sauce consistency. Set aside.

In a heavy-bottomed saucepan over medium heat, melt 60g butter. Watch for the foam to subside and butter to become clear — this indicates the butter is hot enough and water has evaporated.

Add 45g flour all at once. Whisk vigorously until fully incorporated. Cook roux for 2 minutes — this eliminates raw flour taste. The mixture should smell nutty, not starchy.

Remove pot from heat. Slowly stream in 720ml whole milk while whisking constantly. This prevents lumps. Return to medium heat.

Cook, stirring continuously, until sauce thickens and coats the back of a spoon (approximately 80-85°C, or 3-5 minutes). Record thickness time for reproducibility.

Reduce heat to low. Add 280g grated cheddar in three additions, stirring each batch until fully melted before adding the next. Temperature must stay below 70°C — above this, cheese proteins denature and you get grainy sauce.

Season with 1.5 tsp salt and 0.5 tsp black pepper. Taste. Adjust seasoning. The sauce should taste slightly too salty — it will dilute when mixed with pasta.

Add drained pasta to cheese sauce. Fold gently. If sauce is too thick, add reserved pasta water 30ml at a time until desired consistency is achieved. Target: each pasta piece coated, not swimming.

Transfer to a buttered 9x13 baking dish. Mix 60g breadcrumbs with 30g melted butter, sprinkle evenly over top.

Bake at 190°C (375°F) for 20-25 minutes until topping is golden and edges are bubbling. Internal sauce temp should reach 82°C for food safety.

Rest 5 minutes before serving. This allows sauce to set slightly — cutting too early produces runny results. Record final observations.