Why it works: Liver and onion are a kitchen classic. They rank in the top 15% of all ingredient pairs, and cooks put them together in 1,420 recipes. Both carry furaneol, which smells caramel, strawberry. The science ↓
A Haggis
Ingredients
Directions
Prepare
Clean the sheep's stomach and soak it in cold water overnight.
Boil the sheep's pluck until very tender, then mince it finely.
Make the filling
Mix the minced pluck with suet, white pepper, salt, onion, and toasted oatmeal.
Add 4 cups of the liquid from boiling the pluck to the mixture and combine well.
Cook and serve
Stuff the mixture into the sheep's stomach and sew it securely to prevent water from entering.
Boil the stuffed stomach for 3 hours and serve in a deep dish.
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.
-
Liver + oniontop 15% of all pairsSmell alikelowCooked together1,420 recipes
Shared aroma: furaneol (caramel, strawberry).
-
Liver + white peppertop 28% of all pairsSmell alikelowCooked together61 recipes
Shared aroma: eucalyptol (eucalyptus, herbal).
-
White pepper + oniontop 28% of all pairsSmell alikelowCooked together2,395 recipes
Shared aroma: 2-methylbutyraldehyde (malty, chocolate).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Sheep's pluck
- Provides the main meaty body of the filling, which is tenderised by long boiling.
- Suet
- Adds fat that keeps the filling moist and rich as it cooks.
- Toasted oatmeal
- Absorbs liquid and gives the filling a firm, crumbly texture.
- Liquid from boiling the pluck
- Moistens the mixture and carries flavour through the filling.
- Onion
- Adds savoury sweetness and aroma to the filling.
The step that matters
Sew the stomach securely. If the seal leaks, water enters the stuffing during the long boil, diluting the filling and making it soggy rather than set and sliceable.
Swap the white pepper
How well each one fits the dish's main ingredients (liver, onion):
- Garlicfits better
- Thymefits better
- Capersfits better
- White pepperthe original
Fit is the average pairing score against liver, onion. 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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