Why it works: Mustard and parsley match in chemistry and in kitchens. They rank in the top 8% of all ingredient pairs, and cooks put them together in 2,588 recipes. Both carry trans-2-hexenal, which smells green, leafy. The science ↓
Cheese Straws
Ingredients
Directions
The book says “a quick oven”. The 400°F (200°C) in the steps is the modern equivalent, not the book's own figure.
Prepare
Roll out the puff pastry to a thickness of a silver dollar.
Cut the pastry into strips 1.5 inches wide and 4 inches long.
Assemble
Place a little grated cheese along the center of half the strips.
Top each cheese strip with another strip without cheese to form a sandwich.
Brush each sandwich with the egg yolk.
Bake and serve
Bake in a 400°F (200°C) oven until golden.
Serve cold or warm, piled on a napkin, with mustard and cress or parsley garnish.
Transcribed from a scanned cookbook and modernised for today's kitchens. Where the book gave no heat or time, or said "a moderate oven", the temperatures and times here may be modern equivalents rather than the book's own figures.
Explore the science
The flavor team
The pairs that carry this dish. Each one is judged two ways: how much their aromas overlap, and how often cooks already put them together.
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Mustard + parsleytop 8% of all pairsSmell alikestrongCooked together2,588 recipes
Shared aroma: trans-2-hexenal (green, leafy).
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Cheese + mustardtop 11% of all pairsSmell alikemoderateCooked together1,805 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Egg + parsleytop 21% of all pairsSmell alikemoderateCooked together18,765 recipes
Shared aroma: 2,4-decadienal (seaweed).
-
Cheese + parsleytop 25% of all pairsSmell alikemoderateCooked together1,507 recipes
Shared aroma: alpha-pinene (pine, turpentine).
-
Cheese + eggtop 28% of all pairsSmell alikemoderateCooked together6,253 recipes
Shared aroma: 2-nonenal (fatty, green).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Puff paste or rough puff
- Forms flaky layers that puff and separate when baked, giving the straws their crisp texture.
- Grated cheese
- Melts inside the pastry, adding savory richness and flavor to each straw.
- Egg yolk
- Brushed on top, it promotes golden browning and a glossy finish.
The step that matters
Brush each sandwich with the egg yolk. Egg yolk gives the pastry its golden colour through browning and a glossy finish. Brushing too thickly can pool the yolk and seal the edges, which stops the layers from rising evenly.
Swap the parsley
How well each one fits the dish's main ingredients (cheese, egg, mustard):
- Capersfits better
- Tarragonfits better
- Dillfits better
- Parsleythe original
Fit is the average pairing score against cheese, egg, mustard. Candidates are from the same food group and used in at least 100 recipes.
“What each ingredient does” and “The step that matters” were written by Claude from this recipe’s own method and reviewed in samples by CompKitchen.
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